Epidemiology and clinical psychiatry.
D004812:Epidemiologic Methods; D004813:Epidemiology / Q000266:history; D049673:History, 20th Century; D006801:Humans; D007558:Italy; D001523:Mental Disorders / Q000453:epidemiology / Q000266:history; D010383:Pellagra / Q000266:history; D011570:Psychiatry / Q000266:history; D014481:United States