1. Department of Internal Medicine & Nephrology, Vita Center, 69000 Zaporozhye, Ukraine
2. Department of Prevention and Treatment of Emergency Conditions, L.T. Malaya Therapy National Institute of the National Academy of Medical Sciences of Ukraine, 2A Liubovi Maloy av., 61039 Kharkiv, Ukraine
3. Department of Internal Medicine, Zaporozhye Medical Academy of Postgraduate Education, 20, Vinter av., 69096 Zaporozhye, Ukraine
4. Klinik Barmelweid, Department of Psychosomatic Medicine and Psychotherapy, 5017 Barmelweid, Switzerland
5. Department of Internal Medicine II, Division of Cardiology, Paracelsus Medical University, 5020 Salzburg, Austria
6. Department of Internal Medicine, Zaporozhye State Medical University, 26, Mayakovsky av., 69035 Zaporozhye, Ukraine