1. From the University of Athens School of Medicine, Athens, Greece; Roswell Park Cancer Institute, Buffalo; St Vincents Catholic Medical Center; Weill Medical College of Cornell University; Adult Bone Marrow Transplantation Service, Memorial Sloan-Kettering Cancer Center, New York, NY; Mayo Clinic, Rochester, MN; Wilhelminenspital, Vienna, Austria; Service d'Immuno-Hématologie, Hopital Saint-Louis, Paris, France; Hospital Clinic, Barcelona; the University Hospital of Salamanca, Salamanca, Spain; Tufts...