| Affiliation: | a Clinic of Pediatrics, Clinical Center, Medical faculty, University of Nis, Serbiab Clinic for Cardiovascular Diseases — Institute for Treatment and Rehabilitation, Niska Banja, Serbiac University Children's Hospital, Belgrade, Serbiad Queen's Hospital, London, United Kingdome Institute of Pathology, Medical faculty, University of Nis, Serbiaf Departments of Pediatrics, Regional Hospital Naestved, Denmarkg Mother and Child Health Institute, “Dr Vukan Cupic” Belgrade, Serbiah Institute of Hygiene, Faculty of Sport and Physical Education, University of Nis, Serbia |
