Infection and antibiotic usage at Boston City Hospital, January 1970.
D000667:Ampicillin / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001900:Boston; D003428:Cross Infection / Q000453:epidemiology / Q000517:prevention & control*
D000900:Anti-Bacterial Agents; D000667:Ampicillin