1. School of Medicine, Belgrade + Institute for Mother and Child Health Care of Serbia “Dr Vukan Čupić”, Department of Pediatric Cardiothoracic Surgery, Belgrade
2. Institute for Mother and Child Health Care of Serbia “Dr Vukan Čupić”, Department of Pediatric Cardiothoracic Surgery, Belgrade
3. School of Medicine, Belgrade + Institute for Mother and Child Health Care of Serbia “Dr Vukan Čupić”, Department of Pediatric Cardiology, Belgrade