Arginine/analogs & derivatives; Fondaparinux; Gastrointestinal Neoplasms/complications; Hematologic Neoplasms/complications; Heparin; Pipecolic Acids; Sulfonamides; Thrombocytopenia; Aged; Anticoagulants/administration & dosage; Anticoagulants/adverse effects; Arginine/administration & dosage; Arginine/adverse effects; Canada/epidemiology; Female; Fondaparinux/administration & dosage; Fondaparinux/adverse effects; Gastrointestinal Neoplasms/mortality; Gastrointestinal Neoplasms/pathology; Gastrointestinal Neoplasms/therapy; Hematologic Neoplasms/mortality; Hematologic Neoplasms/pathology; Hematologic Neoplasms/therapy; Hemorrhage/chemically induced; Heparin/administration & dosage; Heparin/adverse effects; Humans; Male; Patient Acuity; Pipecolic Acids/administration & dosage; Pipecolic Acids/adverse effects; Platelet Count/methods; Platelet Count/statistics & numerical data; Retrospective Studies; Risk Adjustment/methods; Sulfonamides/administration & dosage; Sulfonamides/adverse effects; Thrombocytopenia/chemically induced; Thrombocytopenia/diagnosis; Thrombocytopenia/prevention & control

Cancer; HIT; Heparin; Heparin induced thrombocytopenia; Myeloproliferative neoplasm; Thrombosis