1. Department of Cardiology, “Bagdasar Arseni” Emergency Hospital, University of Medicine and Pharmacy “Carol Davila”, 011241 Bucharest, Romania
2. Department of Anaesthesia and Intensive Care, Fundeni Clinical Institute, 022328 Bucharest, Romania
3. Department of Cardiology, Emergency Hospital “Bagdasar-Arseni”, 050474 Bucharest, Romania
4. Economic Cybernetics and Informatics Department, The Bucharest University of Economic Studies, 010374 Bucharest, Romania