The sources of innovation.
D002986:Clinical Trials as Topic; D004358:Drug Therapy / Q000266:history*; D006801:Humans; D007880:Legislation, Drug; D010406:Penicillins / Q000266:history; D013449:Sulfonamides / Q000266:history; D014481:United States; D014486:United States Food and Drug Administration
D010406:Penicillins; D013449:Sulfonamides