Retrospectroscope: the clouded crystal ball.
D006348:Cardiac Surgical Procedures / Q000266:history*; D002309:Cardiology / Q000266:history*; D003140:Communicable Disease Control / Q000266:history*; D005544:Forecasting; D006354:Heart, Artificial / Q000266:history*; D006493:Heparin / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007328:Insulin / Q000266:history*; D011054:Poliovirus Vaccine, Inactivated / Q000266:history*
D007328:Insulin; D011054:Poliovirus Vaccine, Inactivated; D006493:Heparin