Affiliation: | a Institute of Biomedicine/Physiology, Biomedicum Helsinki, University of Helsinki, P.O. Box 63, 00014 Helsinki, Finland b Ludwig Institute for Cancer Research, Karolinska Institute, Box 240, 171 77 Stockholm, Sweden c Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden d Institute of Clinical Medicine/Clinical Chemistry, University of Helsinki and Helsinki University Central Hospital, Finland |