1 Institute of Clinical Chemistry and Laboratory Medicine and the Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany.
2 Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany.
3 Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.