1. From the Department of Clinical Oncology, Leiden University Medical Center, The Netherlands; Division of Tumor Biology, The Netherlands Cancer Institute, Amsterdam; Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, The Netherlands; Institut de Génétique Moléculaire de Montpellier, CNRS UMR5535, France; and Department of Medicine, Evanston Northwestern Healthcare Research Institute, IL.