{"title":"Is pharmaceutical innovation declining?: interpreting measures of pharmaceutical innovation and regulatory impact in the USA, 1950-1980.","authors":"W M Wardell, L E Sheck","doi":"","DOIUrl":null,"url":null,"abstract":"","PeriodicalId":76408,"journal":{"name":"Rational drug therapy","volume":"17 1","pages":"1-7"},"PeriodicalIF":0.0000,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rational drug therapy","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}