1. 1Faculty of Medicine, University of Belgrade; Multidisciplinary Center for Polyclinic Diagnostics, Assessment and Treatment of Blood Pressure Disorders, Clinic for Cardiology, Clinical Centre of Serbia, Pasterova 2, 11000, Belgrade, Serbia
2. 2Institute of Hygiene and Medical Ecology, Faculty of Medicine, University of Belgrade, Dr Subotica 8, 11000, Belgrade, Serbia
3. 3Clinic for Internal Diseases ‘Intermedica — dr Lovic’, Jovana Ristića 20/III-2, 18000, Niš, Serbia
4. 4Faculty of Medicine, University of Kragujevac, Svetozara Markovića 69, 34000, Kragujevac, Serbia