1. Department of Endocrinology, Bashkir State Medical University, Lenin Str. 3, 450008 Ufa, Russia
2. Department of Internal Medicine, Bashkir State Medical University, Lenin Str. 3, 450008 Ufa, Russia
3. Laboratory for the Study of Socio-Economic Problems of the Regions, Ufa University of Science and Technology, Z. Validi Str. 32, 450076 Ufa, Russia
4. Clinic for Internal Medicine II, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria
5. Department of Internal Medicine, Cardiology, Nephrology and Intensive Care Medicine, Hospital Wiener Neustadt, 2700 Wiener Neustadt, Austria
6. Department of Internal Medicine II, Salzkammergut Klinikum, OÖG, 4840 Voecklabruck, Austria
7. Department of Cardiology, Kepler University Hospital, Medical Faculty, Johannes Kepler University, 4040 Linz, Austria