1. Department of Pathophysiology, Faculty of Medicine University of Prishtina Prishtina Kosovo
2. Pediatric Clinic University Clinical Centre of Kosovo Prishtina Kosovo
3. Department of Premedical Courses, Faculty of Medicine University of Prishtina Prishtina Kosovo
4. Comprehensive Heart Failure Center University and University Hospital Würzburg Würzburg Germany
5. Department of Pathophysiology, School of Medicine University of Zagreb Zagreb Croatia
6. Department of Pediatrics, Rainbow Babies and Children's Hospital Case Western Reserve University Cleveland Ohio USA