title: Open label extension studies and the ethical design of clinical trials.
authors.affiliation: Philadelphia Veterans Affairs Medical Center, USA.
authors.forename: D
authors.initials: D
authors.lastname: Casarett
authors.forename: J
authors.initials: J
authors.lastname: Karlawish
authors.forename: P
authors.initials: P
authors.lastname: Sankar
authors.forename: K B
authors.initials: KB
authors.lastname: Hirschman
authors.forename: D A
authors.initials: DA
authors.lastname: Asch
mesh_terms: D000328:Adult; D000368:Aged; D000700:Analgesics / Q000627:therapeutic use*; D001294:Attitude to Health; D002986:Clinical Trials as Topic; D015507:Drugs, Investigational; D028744:Ethics Committees, Research; D005069:Evaluation Studies as Topic; D006801:Humans; D009042:Motivation; D010146:Pain / Q000188:drug therapy; D012107:Research Design; D035842:Research Subjects; D018570:Risk Assessment
chemical_list: D000700:Analgesics; D015507:Drugs, Investigational