Safety Study of Preimplantation Factor (PIF-1) to Treat Acute Steroid-Resistant Graft-Versus-Host Disease (GVHD)

"The study will include 6 patients and will last for at least six months. The first three patients will receive PIF-1 (0.5 mg/kg/day for 14 days) by subcutaneous injection. The dosage in the next three patients may be increased to 1 mg/kg/day for 14 days.~Patients will be treated serially: each patient will be followed for 2 weeks after cessation of PIF-1 administration before the next patient begins PIF-1 administration."