1. Department of Propaedeutics of Internal Diseases and Clinical Information Technologies Federal State Autonomous Educational Institution of Higher Education “Belgorod National Research University” Belgorod, Russia.
2. Department of Therapy, Geriatrics and Anti-Aging Medicine Academy of Postgraduate Education under the Federal State Budgetary Unit «Federal Scientific and Clinical Center for Specialized Medical Assistance and Medical Technologies of the Federal Medical Biological Agency» Moscow, Russia
3. Department of clinical gerontology Independent noncommercial organization «Research Medical Centre «Gerontology» Moscow, Russia
4. MEDSI Clinic Moscow, Russia
5. Department of Propaedeutics of Internal Diseases and Clinical Information Technologies Federal State Autonomous Educational Institution of Higher Education «Belgorod National Research University» Belgorod, Russia
6. Therapeutic Department Regional State Budgetary Healthcare Institution «City Hospital № 2 of Belgorod» Belgorod, Russia