Usefulness of endoscopic ultrasonography in preoperative gastric cancer staging: diagnostic yield and therapeutic impact von Repiso, A, Gómez-Rodríguez, R, López-Pardo, R, Lombera, M M, Romero, M, Aranzana, A, Abad, S, Rodríguez-Merlo, R, López, L, Carboles, J M

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