title: Recurrence of venous thromboembolism.
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use*; D004361:Drug Tolerance; D005500:Follow-Up Studies; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D011183:Postoperative Complications; D011379:Prognosis; D011655:Pulmonary Embolism / Q000188:drug therapy / Q000453:epidemiology* / Q000209:etiology; D012008:Recurrence; D013924:Thrombophlebitis / Q000188:drug therapy / Q000453:epidemiology* / Q000209:etiology
chemical_list: D000925:Anticoagulants; D006493:Heparin