1 Institute of Molecular Biosciences, University of Graz, Humboldtstrasse 50, 8010 Graz, Austria.
2 Institute of Molecular Biosciences, University of Graz, Humboldtstrasse 50, 8010 Graz, Austria. ; Division of Endocrinology and Metabolism, Dept. of Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria.