[1] Univ Crete, Sch Med, Dept Neurol, Iraklion, Crete, Greece
[2] Univ Crete, Sch Med, Clin Social & Family Med, Iraklion, Crete, Greece
[3] Univ Crete, Sch Med, Dept Pediat, Iraklion, Crete, Greece
[4] Chania Gen Hosp, Pediat Clin, Khania, Crete, Greece
[5] Univ Nijmegen Hosp, Dept Pediat, NL-6500 HB Nijmegen, Netherlands
[6] Univ Hosp, Dept Gen Pediat 1, Frankfurt, Germany