Keri Ka-Yee Wong, Efstathios Papachristou, Marta Francesconi, Tycho J. Dekkers
{"title":"Editorial: ‘Like a bee and a flower’ – the symbiotic relationship between physical environment and children and young people's psychosocial outcomes","authors":"Keri Ka-Yee Wong, Efstathios Papachristou, Marta Francesconi, Tycho J. Dekkers","doi":"10.1111/camh.12773","DOIUrl":"10.1111/camh.12773","url":null,"abstract":"<p>This special issue captures the multifaceted and dynamic human–environment relationship across a critical stage of development and illustrates the importance of the physical environment in understanding child and adolescent mental health. Illustrated through original articles, action research, systematic reviews, debates, editorial perspectives and commentaries, our authors showcase the nuances of this relationship through diverse methodologies, data sources, interdisciplinary teams and international perspectives. Authors evidence the impact of physical environmental characteristics on psychosocial outcomes early in life, for both community and clinical populations. Exposure to adversities early in life or during critical developmental periods, such as early childhood and adolescence, has the potential to shape later life outcomes. We hope this special issue provides helpful examples of good practice and the ways of working together needed to inspire future youth-led context-specific health research. We also hope that this special issue can encourage us to rethink public health and education policies, urban planning and design priorities, and clinical research and practice to have young people in the centre of this work.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"115-118"},"PeriodicalIF":6.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12773","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143711886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Letter to the Editor: Integrating context-specific and universal strategies: reflections on Birrell et al.'s universal school-based mental health interventions.","authors":"Yi-Chia Hung, Lien-Chung Wei","doi":"10.1111/camh.12778","DOIUrl":"https://doi.org/10.1111/camh.12778","url":null,"abstract":"<p><p>This letter responds to Birrell et al.'s (Child and Adolescent Mental Health, 30, 92) article on universal school-based mental health interventions, emphasizing the importance of refining universal approaches rather than discarding them. The letter discusses critical aspects of program adaptation to cultural contexts, the role of meaningful co-design with students and staff, and the integration of targeted strategies in concert with universal approaches. It also highlights the potential of digital health technologies, emphasizing equitable access and personalization to diverse populations. Additionally, the letter calls for a broader evaluation of intervention impacts beyond symptom reduction, including stigma reduction, school climate, and help-seeking behaviors. Drawing from recent evidence, the letter advocates for integrated models that combine universal and targeted strategies, offering practical recommendations for future research and policy.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":" ","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Narrative Matters: Improving young people's mental health through neighbourhood initiatives – the role of ‘collective local intelligence’ in Manchester","authors":"Joe Ravetz","doi":"10.1111/camh.12766","DOIUrl":"10.1111/camh.12766","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Young persons’ well-being is the key priority for this case study on the inner-city neighbourhoods of Manchester, and the challenges of coordination and synergy between the many organizations involved.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The ‘Local-wise’ project draws from insights on ‘collective local intelligence’, and the methods of the ‘Pathways toolkit’ which can explore and work with stakeholders on ways forward.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The findings point towards positive linkages between pro-active neighbourhood initiatives, and the young person's mental health/well being.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>There is huge potential for upstream preventive work, where ideally the local neighbourhood is a place of belonging, identity and livelihood, as a counter to the pressures of globalization, precarity and social media.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"198-201"},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12766","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gonzalo Salazar de Pablo, Claudia Aymerich, Grace Frearson, Javier de Otazu Olivares, Ana Catalan
{"title":"Commentary: Response - Building on existing knowledge and redefining rather than abandoning the well-established 'clinical high risk for psychosis' prevention paradigm: Commentary on Tiffin and Kelleher \"Time to abandon the 'clinical high risk state for psychosis\" (CHR-P) concept in adolescence?\"","authors":"Gonzalo Salazar de Pablo, Claudia Aymerich, Grace Frearson, Javier de Otazu Olivares, Ana Catalan","doi":"10.1111/camh.12777","DOIUrl":"https://doi.org/10.1111/camh.12777","url":null,"abstract":"<p><p>We appreciate the commentary by Tiffin and Kelleher on our systematic review and meta-analysis. The CHR-P paradigm remains one of the most established preventive approaches in mental health. While concerns have been raised regarding the clinical utility of the CHR-P paradigm, its implementation in specialized services worldwide supports its relevance. These services provide evidence-based interventions, reducing unnecessary antipsychotic use and guiding treatment strategies. Tiffin and Kelleher's critique largely focuses on transition rates and age cutoffs. While we argue that transition rates in adolescents at CHR-P are significant, other outcomes need to be considered. Among others, negative symptoms are clinically significant in adolescents at CHR-P, impairing functioning and long-term outcomes. We think we should refine and improve the CHR-P paradigm rather than simply abandoning it. With advancements in precision medicine, we can improve risk stratification and tailor interventions to better serve individuals at risk. We can also expand the paradigm, so it supports other help-seeking adolescents at risk requiring transdiagnostic, developmentally sensitive interventions to prevent psychosis.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":" ","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Commentary: Time to abandon the 'clinical high risk state for psychosis' (CHR-P) concept in adolescence? Commentary on Frearson et al. 'Efficacy of preventative interventions for children and adolescents at clinical high risk of psychosis: A systematic review and meta-analysis of intervention studies'.","authors":"Paul A Tiffin, Ian Kelleher","doi":"10.1111/camh.12776","DOIUrl":"https://doi.org/10.1111/camh.12776","url":null,"abstract":"<p><p>There has been much academic interest in 'the clinical high risk for psychosis' (CHR-P) concept. Indeed, as two child and adolescent psychiatrists interested in psychosis prediction and prevention, we enthusiastically embraced the paradigm in our clinical and academic work. However, despite more than two decades of research, there is no definition of CHR-P in adolescence that has proven to be able to usefully predict transition to psychosis. Indeed, research suggests that much, if not all, of the risk associated with CHR diagnoses in adolescents is captured by being help-seeking for mental health problems, rather than being associated with a CHR diagnosis itself. In this commentary, we critique the systematic review by Frearson et al. (2025). In particular, we challenge the conceptualisation around the CHR-P concept, as applied to under 18 s, and the assumptions underpinning it. We also highlight issues with the terminology used when describing the experiences of young people categorised as being at CHR-P. Rather, we make the case for understanding and supporting help-seeking young people with distressing perceptual and ideational disturbance employing a needs-based, person-centred approach.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":" ","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The role of neighbourhood greenspace quantity on mental health and cognitive development in early to middle childhood: a multilevel growth curve analysis of the UK Millennium Cohort Study","authors":"Georgia Cronshaw, Emily Midouhas, Peninah Murage, Eirini Flouri","doi":"10.1111/camh.12767","DOIUrl":"10.1111/camh.12767","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Childhood shapes lifelong wellbeing, making it crucial to understand how environmental factors impact development. This study examines the impact of neighbourhood greenspace quantity on the trajectories of emotional, behavioural and cognitive outcomes across childhood (at ages 3, 5, 7 and 11 years) with data from the UK's Millennium Cohort Study.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Using multilevel growth curve models, we assessed the role of neighbourhood greenspace in small standard areas on trajectories of conduct problems, hyperactivity/inattention, peer problems, emotional symptoms and cognitive ability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>There was no direct association between greenspace and these child outcomes at the intercept (~ aged 7 years). However, greenspace was related to the slope of both conduct problems and cognitive ability, suggesting possible benefits in the early years, mainly before the start of formal education.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The study highlights the potential effect of greenspace quantity on child development, but in the context of age. Longitudinal research tracking outcomes beyond childhood can shed more light on age-related effects of greenspace across areas of development.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"159-167"},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12767","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shannon Shaughnessy, Daniel Messinger, Spencer C. Evans
{"title":"Longitudinal effects of green, blue, and gray spaces on early adolescent mental health in the United States","authors":"Shannon Shaughnessy, Daniel Messinger, Spencer C. Evans","doi":"10.1111/camh.12763","DOIUrl":"10.1111/camh.12763","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Physical environments are linked to adolescents' well-being in various ways. Green and blue (natural) spaces may protect against psychopathology, while gray (urban) spaces may confer risk. The present study examines how exposure to green, blue, and gray spaces is associated with the growth of psychopathology in early adolescence.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Method</h3>\u0000 \u0000 <p>We analyzed four waves of data (ages 9–13) from the Adolescent Brain Cognitive Development Study (<i>N</i> = 11,866, 47.8% female). At each wave, parents rated youths' mental health symptom severity in broad domains of total, externalizing, and internalizing problems. Latent growth curve models were estimated to model symptom trajectories. We examined the associations of residential proximity to green, blue, and gray spaces with symptoms at baseline and over time using geocoded and satellite data.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Green space was associated with lower levels of internalizing problems at baseline, while gray space was associated with higher levels of total and externalizing problems at baseline; however, all these effects diminished with time. Gray space was also associated with a slightly less positive slope for internalizing problems. There were no significant associations with blue space. Most results attenuated to nonsignificance once sociodemographic variables were accounted for.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Green and gray space exposure may be positively and negatively associated with adolescents' psychosocial development, respectively. However, demographic variables such as gender and socioeconomic status may account for more change in early adolescent psychopathology than environmental variables. Regardless, greater attention to youths' green and gray space exposure could help promote mental health at a population level.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"119-130"},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12763","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reinout W. Wiers, Urban Mental Health Researchers, Hanan El Marroun, Claudi Bockting, Harm Krugers
{"title":"Debate: Urban versus rural environments – which is better for mental health? The one good thing about a small town…","authors":"Reinout W. Wiers, Urban Mental Health Researchers, Hanan El Marroun, Claudi Bockting, Harm Krugers","doi":"10.1111/camh.12771","DOIUrl":"10.1111/camh.12771","url":null,"abstract":"<p>Urban environments are related to higher prevalences of common mental disorders (addictions, anxieties and mood disorders) in adults. The mechanisms underlying this relationship are less clear. Cities function as a magnet, related to economic and educational opportunities, but are also related to urban stress and low well-being. Urban areas have larger inequalities, and people in deprived areas are at enhanced risk for mental health problems, which have been related both to environmental factors like pollution and to perceptions of the (social) environment, including perceived safety and social support. The interactions of vulnerability factors at different levels of description (e.g., within-person stress vulnerability vs. neighborhood stressors) can be considered a complex system. We here discuss what is known about growing up in an urban versus rural environment, with the aim to identify target points for mental health-related interventions in youth. We summarize this for three broad developmental periods: early life (first 1000 days), childhood, and adolescence into young adulthood, with implications for interventions.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"189-191"},"PeriodicalIF":6.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12771","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143671409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Uxue Zubizarreta-Arruti, Rosa Bosch, María Soler Artigas, Judit Cabana-Domínguez, Natalia Llonga, Pau Carabí-Gassol, Valeria Macias-Chimborazo, Laura Vilar-Ribó, Josep Antoni Ramos-Quiroga, Mireia Pagerols, Raquel Prat, Cristina Rivas, Èlia Pagespetit, Júlia Puigbó, Gemma Español-Martín, Bruno Raimbault, Antonia Valentín, Jordi Sunyer, Maria Foraster, Mireia Gascón, Miquel Casas, Marta Ribasés, Silvia Alemany
{"title":"Associations between air pollution and surrounding greenness with internalizing and externalizing behaviors among schoolchildren","authors":"Uxue Zubizarreta-Arruti, Rosa Bosch, María Soler Artigas, Judit Cabana-Domínguez, Natalia Llonga, Pau Carabí-Gassol, Valeria Macias-Chimborazo, Laura Vilar-Ribó, Josep Antoni Ramos-Quiroga, Mireia Pagerols, Raquel Prat, Cristina Rivas, Èlia Pagespetit, Júlia Puigbó, Gemma Español-Martín, Bruno Raimbault, Antonia Valentín, Jordi Sunyer, Maria Foraster, Mireia Gascón, Miquel Casas, Marta Ribasés, Silvia Alemany","doi":"10.1111/camh.12772","DOIUrl":"10.1111/camh.12772","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Air pollution and greenness are emerging as modifiable risk and protective factors, respectively, in child psychopathology. However, research shows inconsistencies. Here, we examined associations between air pollution and surrounding greenness with internalizing and externalizing behaviors. In addition, the potential modifying role of the genetic susceptibility for these traits and socioeconomic status (SES) was explored.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>This population-based study included 4485 schoolchildren aged 5–18 years from Spain. Internalizing and externalizing behaviors were assessed using the Child Behavior Checklist (CBCL). Average air pollution (NO<sub>2</sub>, PM<sub>2.5</sub>, PM<sub>10</sub>, PM<sub>coarse</sub>, and PM<sub>2.5</sub> absorbance) and surrounding greenness (NDVI within 100-m, 300-m, and 500-m buffers) school exposure were estimated for 12 months before outcome assessment. Genetic liability was assessed by computing polygenic risk scores (PRS) and SES was calculated using the Hollingshead Four-Factor Index. Associations were analyzed using negative binomial mixed-effects models.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Although no associations survived multiple testing, we found that increases of 5.48 μg/m<sup>3</sup> in PM<sub>10</sub> and 2.93 μg/m<sup>3</sup> in PM<sub>coarse</sub> were associated with a 6% (Mean Ratio (MR) = 1.06; 95% CI: 1.01–1.12) and a 4% (MR = 1.04; 95% CI: 1.00–1.09) increase in internalizing behavior scores. A 0.1 increase in NDVI within a 100-m buffer was associated with a 6% decrease in externalizing behavior (MR = 0.94; 95% CI: 0.89–0.99). Neither differences by sex or age, or moderation effects by PRS or SES, were observed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>We found preliminary evidence of detrimental effects of air pollution on internalizing behavior and protective effects of greenness on externalizing behavior, which were not modified by sex, age, SES, or genetic liability. If confirmed, these results reinforce the need for improving air quality, especially around schools, as part of preventive strategies focused on childhood psychopathology.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"149-158"},"PeriodicalIF":6.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12772","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143671395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Debate: Urban–rural environments – which is better for mental health? Moving beyond urban–rural dichotomies in psychosis risk for young people","authors":"James B. Kirkbride","doi":"10.1111/camh.12761","DOIUrl":"10.1111/camh.12761","url":null,"abstract":"<p>While urban–rural gradients exist for common mental disorders (Wiers et al., 2025), observations from the Global North suggest these are strongest for psychotic disorders, which typically emerge during adolescence. Despite well-documented urban–rural variation in risk, recent research suggests a more nuanced relationship between place and these severe mental illnesses exists. Traditional urban–rural dichotomies cannot account for social gradients in psychosis globally for young people. Instead, a framework centred on social identity, inclusion and belonging may provide a more comprehensive approach to understanding psychosis risk as a result of the environments in which people are born, raised and live. Future research should integrate traditional epidemiological designs with causal inference methods and new technologies to capture momentary responses to diverse environmental stimuli that are both place-based and placeless. This approach could uncover novel avenues for prevention and intervention, tailored to the digital age, ultimately improving outcomes for young people and families affected by psychosis.</p>","PeriodicalId":49291,"journal":{"name":"Child and Adolescent Mental Health","volume":"30 2","pages":"192-194"},"PeriodicalIF":6.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/camh.12761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}