1. Departments of Pediatrics (G.R., W.K., L.P.), Regional Hospital of Bolzano, 39100 Bolzano, Italy
2. Department of Pediatrics (F.B.), University of Brescia, 15-25121 Brescia, Italy
3. Internal Medicine (C.C.), Regional Hospital of Bolzano, 39100 Bolzano, Italy
4. Department of Pediatrics (N.d.I., M.M.), IRCCS G. Gaslini Institute, University of Genova, 16147 Genova, Italy