HETEROTOPIC GASTRIC MUCOSA OF THE ESOPHAGUS AS A POTENTIAL CAUSE OF PEPTIC STENOSIS AFTER ROUX-EN-Y GASTRIC BYPASS by João Victor Vecchi Ferri, Wagner Herbert Sobottka, José Alfredo Sadowski, Gustavo Rodrigues Alves Castro, Vitor Mamoru Haida, Marcela Scardua Cocicov, João Caetano Dallegrave Marchesini

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