Comparison of drug combinations to prevent graft-versus-host disease after stem cell transplant

The purpose of this study to see if the drug ruxolitinib with the drugs tacrolimus and methotrexate given before and following a peripheral blood stem cell transplant will prevent graft-versus-host disease (GVHD), a serious complication of a stem cell transplant, better than the drugs post-transplant cyclophosphamide, tacrolimus, and mycophenolate mofetil.