1. From the Department of Internal Medicine (S.P., A.T.), Division of Endocrinology and Metabolism, Medical University of Graz, Graz, Austria; the Clinical Institute of Medical and Chemical Laboratory Diagnostics (A.M., W.M.), Medical University of Graz, Graz, Austria; the Department of Medicine (C.D., V.K., C.W.), Division of Nephrology, University of Würzburg, Würzburg, Germany; the Department of Nephrology (E.R.), University of Heidelberg, Heidelberg, Germany; the Division of Endocrinology, Diabetes...