title: Studies on the frequency of heparin-associated thrombocytopenia.
mesh_terms: D000818:Animals; D002417:Cattle; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006493:Heparin / Q000009:adverse effects*; D006801:Humans; D011446:Prospective Studies; D011897:Random Allocation; D013552:Swine; D013921:Thrombocytopenia / Q000139:chemically induced*
chemical_list: D006493:Heparin