1. From the Institute of Biochemistry, University of Lausanne and Swiss Institute for Experimental Cancer Research, BIL Research Centre, CH-1066 Epalinges, Switzerland; the Division for Clinical Onco-Immunology, Ludwig Institute for Cancer Research, CHUV, CH-1011 Lausanne, Switzerland; the Division of Haematology, Geneva University Hospital, CMU, 1211 Geneva 14, Switzerland; and Biogen, Inc., Depart