Necessity for Surgery in Children with Gastrooesophageal Reflux and Supraoesophageal Symptoms - Mattioli, G; Sacco, O; Repetto, P; Pini Prato, A; Castagnetti, M; Carlini, C; Torre, M; Leggio, S; Gentilino, V; Martino, F; Fregonese, B; Barabino, A; Gandullia, P; Rossi, G A; Jasonni, V (European Journal of Pediatric Surgery, 2004)