Ten strategies to formulate a strong research question

1Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Harvard Medical School, Boston, USA. 2Neurotherapeutics and Experimental Psychopathology Group, Psychological Neuroscience Laboratory, CIPsi, School of Psychology, University of Minho, Braga, Portugal. 3Principles and Practice of Clinical Research (PPCR) Course, Executive and Continuing Professional Education, Harvard T.H. Chan School of Public Health, Boston, USA. #These authors have contributed equally to this work. *Corresponding author: Felipe Fregni MD, PhD, MPH. Neuromodulation Center and Center for Clinical Research Learning, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Harvard Medical School, Boston, USA. Email: Fregni.felipe@mgh.harvard.edu