 - Active systemic fungal, bacterial, viral, or other infection, unless disease is under treatment with anti-microbials andor controlled or stable e.g. if specific, effective therapy is not availablefeasible or desired e.g. chronic viral hepatitis, human immunodeficiency virus HIV; patient needs to be clinically stable as defined as being afebrile and hemodynamically stable for 24 hours; patients with fever thought to be likely secondary to leukemia are eligible 