title: Fifty years of medicine. II.
mesh_terms: D002462:Cell Membrane; D002478:Cells, Cultured; D004992:Ethics, Medical; D013502:General Surgery / Q000266:history; D049673:History, 20th Century; D006801:Humans; D008403:Mass Screening; D013677:Medical Laboratory Science / Q000266:history; D012940:Social Problems; D014481:United States