1. Institute of Immunology, Diagnostic Department, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany.
2. The Calcium Signaling Group, Institute of Biochemistry and Molecular Biology I, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany.
3. Division of Allergy, Immunology, and Rheumatology, University of Rochester Medical Center, 601 Elmwood Drive, Rochester, NY 14642, USA.
4. Department of Molecular Biology, University of Bergen, Thormøhlensgate 55, N-5008 Bergen, Norway.