1 Department of Internal Medicine, Division of Endocrinology and Metabolism, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria; Department of Epidemiology and Biostatistics, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, Netherlands. Electronic address: stefan.pilz@chello.at.
2 Department of Internal Medicine, Division of Endocrinology and Metabolism, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
3 Specialist Clinic for Rehabilitation, Bad Aussee, Austria; Department of Cardiology, Medical University of Graz, Graz, Austria.