Phenindione Completed Phase 3 Trials for Atrial Fibrillation / Intracranial Hemorrhages / Intracranial Hemorrhage, Hypertensive / Subdural haematoma / Flutter, Atrial / Small Vessel Cerebrovascular Disease / Intraventricular Hemorrhage (IVH) / Subarachnoid Hemorrhage / Microhemorrhage Prevention