Early controlled trials. Randomised mental health trial began in 1935...
Gill
D B
DB
D000293:Adolescent; D049673:History, 20th Century; D006801:Humans; D001523:Mental Disorders / Q000628:therapy*; D008603:Mental Health; D016032:Randomized Controlled Trials as Topic / Q000266:history*; D014481:United States