Institution: | (1) Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Biomedical Center, Box 596, S-751 24 Uppsala, Sweden;(2) Department of Cell Research, Swedish University of Agricultural Sciences, Biomedical Center, Box 596, S-751 24 Uppsala, Sweden;(3) Present address: Biomedical Center, Ludwig Institute for Cancer Research, Box 595, S-751 23 Uppsala, Sweden |