Observational versus experimental studies: would the results be similar?
Tsuang
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MT
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