Retrospectroscope: "tell it like it was".
D000925:Anticoagulants / Q000266:history; D004739:England; D006493:Heparin / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008866:Microsurgery / Q000266:history; D010406:Penicillins / Q000266:history; D010827:Physiology / Q000266:history; D011479:Protamines / Q000494:pharmacology; D012107:Research Design; D014481:United States
D000925:Anticoagulants; D010406:Penicillins; D011479:Protamines; D006493:Heparin