GVHD PROPHYLAXIS: Patients initially receive cyclosporine (CSP) IV over 1 hour beginning on day -3. CSP may be given orally (PO) when the patient can tolerate oral medications and has a normal gastrointestinal transit time. CSP is given until day 100, and may taper on day 101 if there is no graft versus host disease. Patients also receive mycophenolate mofetil (MMF) IV every 8 hours on days 0 to 7 and then may receive MMF PO beginning day 8 to 30. MMF is continued for a minimum of 30 days or until 7 days after blood counts recover whichever is later. If there is no evidence of acute GVHD and donor cluster of differentiation (CD)3 engraftment is at least 50% from one donor MMF may be tapered.