422 Combination of techniques for severe hypospadias trying to reduce the morbidity of the repairing surgery von Moreno, Alarcón C, Zambudio, Carmona G, Guirao, Piñera M.J, Cabrejos, Perotti K, Reyes, Ríos P.Y, Fernández, Ibieta M, Martínez, Castaño I, Ruiz, Jiménez J.I

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