1. Excluding older, sicker patients from clinical trials: issues, concerns, and solutions Publication: Washington, D.C. : AARP Public Policy Institute, c2011 Subject(s): Clinical Trials as TopicPatient SelectionRandomized Controlled Trials as TopicAgedAged, 80 and overChronic DiseaseCost-Benefit AnalysisFrail ElderlySample SizeSelection BiasHumansUnited States