[1] Karolinska Inst, Womens & Childrens Hlth, Stockholm, Sweden
[2] Gothenburg Univ, Dept Clin Genet, Inst Biomed, Gothenburg, Sweden
[3] Univ Tromso, Div Immunol IMB, Tromso, Norway
[4] Hokkaido Univ, Fac Sci, Biol Chem Lab, Dept Chem, Sapporo, Hokkaido 060, Japan
[5] Karolinska Inst, Dept Microbiol Tumor & Cell Biol, Stockholm, Sweden