1. Laboratory of Functional Explorations; Center for Advanced Medical and Pharmaceutical Research; Tîrgu Mureş Romania
2. Physiology Department; University of Medicine and Pharmacy of Tîrgu Mureş; Tîrgu Mureş Romania
3. Department of Medical Laboratory; Emergency Military Hospital “Dr. Constantin Papilian,”; Cluj-Napoca Romania
4. Department of Medical Laboratory; Emergency Clinical County Hospital; Tîrgu Mureş Romania
5. Service de Rythmologie; Hôpital Louis Pradel; Lyon France
6. Laboratory of Cardiac Catheterization, Angiography, and Electrophysiology; Emergency Institute for Cardiovascular Diseases and Transplantation; Tîrgu Mureş Romania