title: Observational versus experimental studies: would the results be similar?
authors: M T
authors: MT
authors: Tsuang
mesh_terms: D000328:Adult; D005500:Follow-Up Studies; D006801:Humans; D019370:Observation; D011602:Psychophysiologic Disorders / Q000175:diagnosis* / Q000523:psychology; D012189:Retrospective Studies; D012559:Schizophrenia / Q000534:rehabilitation*; D012565:Schizophrenic Psychology