Institution: | (1) Department of Immunogenetics, National Institute of Haematology and Blood Transfusion, P.O. Box 44, H-1502 Budapest, Hungary;(2) Department of Neurology, University Hospital, Pécs, Hungary;(3) Department of Neurology, Central Hospital of County Fejér, Székesfehérvár, Hungary;(4) Department of Neurology, University Hospital, Novi Sad, Yugoslavia |