The patient's morning platelet count will be taken every day. If this value is less than or equal to 10,000, a prophylactic platelet transfusion will be given. Otherwise, no prophylactic platelet transfusion will be given that day. Platelet transfusions may be given at any time, and at any dose, to treat active bleeding or in association with an invasive procedure. A hemostatic assessment will be carried out every day to identify any bleeding the patient may experience. This assessment involves a patient interview, physical assessment, and a chart review. Data on all transfusions (e.g., platelets and red blood cells), all transfusion-related events, all serious adverse events, and protocol deviations will also be recorded.