1. From the Department of Immunohematology and Blood Bank, University Hospital Leiden, 2300 RC Leiden, the Netherlands; Department of Obstetrics and Gynaecology, Free University Hospital, 1007 MB Amsterdam, The Netherlands; Department of Pathology, University Hospital Leiden, 2300 RC Leiden, The Netherlands; and Cancer Immunology Program, Cardinal Bernadin Cancer Center, Loyola University of Chicago