1. Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
2. Pharmaceutical Biochemistry, Institute of Pharmaceutical and Medicinal Chemistry, University of Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
3. Department of Molecular, Cellular and Pharmacobiology Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, D-53115 Bonn, Germany
4. Department of Internal Medicine, Division of Endocrinology, Diabetology, Vascular Medicine, Nephrology and Clinical Chemistry, University of Tübingen, Otfried-Müller-Strasse 10, D-72076 Tübingen, Germany
5. Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen N, Denmark