title: The development of epidemiology in MRC Units in Wales (1945-1975): a personal view.
mesh_terms: D000328:Adult; D002648:Child; D004812:Epidemiologic Methods; D004813:Epidemiology / Q000266:history*; D005260:Female; D049673:History, 20th Century; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D014852:Wales