In 1986, the Committee of Experts on Blood Transfusion and Immunohae- tology of the Council of Europe chose for their Programme of Co-ordinated Research "An investigation of the procurement and sharing of transplantable organs for potential recipients who are highly sensitized to HLA-antigens." This topic was of common concern to all centres practising renal transplan- tion. The terms of reference of the study were: To estimate the number of patients who are virtually "untransplantable" because of high sensitization in each European country. To study the nature of immunization in terms of the...