Institution: | (1) Present address: Institut d'Anatomie Pathologique de l'Université, 1, rue des Bonnes Villes, B-4000 Liège, (Belgium);(2) Present address: Division of Immunobiology, Wallenberg Laboratory, Lilla Frescatit, (Sweden);(3) Present address: Department of Tumor Biology, Karolisnka Institutet, Stockholm, (Sweden) |