1 Institute for Treatment and Rehabilitation 'Niska Banja', Clinic of Cardiology, University of Nis School of Medicine, Nis, Serbia.
2 Division of Cardiology, University of Perugia School of Medicine, Perugia, Italy.
3 Université de Lorraine, INSERM, Centre d'Investigations Cliniques Plurithématique, INSERM 1433, CHRU de Nancy, Institut Lorrain du Cœur et des Vaisseaux, Nancy, France, and INI-CRCT (Cardiovascular and Renal Clinical Trialists) F-CRIN Network, Nancy, France.