1. Second Department of Pediatrics; ‘P & A Kyriakou’ Children's Hospital; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
2. Scientific Supervisor of Adolescent Health Unit; Second Department of Pediatrics; ‘P& A Kyriakou’ Children's Hospital; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
3. Department of Immunology and Histocompatibility; ‘Evangelismos’ General Hospital; Athens Greece