1. Department of Cardiology, “Bagdasar Arseni” Emergency Hospital, University of Medicine and Pharmacy “Carol Davila”, 011241 Bucharest, Romania
2. Department of Cardiology, Emergency Hospital “Bagdasar-Arseni”, 050474 Bucharest, Romania
3. Department of Internal Medicine, “Coltea” Clinical Hospital, 030167 Bucharest, Romania
4. Economic Cybernetics and Informatics Department, The Bucharest University of Economic Studies, 010374 Bucharest, Romania