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González-Ojeda A, Avalos-González J, Muciño-Hernández MI, López-Ortega A, Fuentes-Orozco C, Sánchez-Hochoa M, Anaya-Prado R, Arenas-Márquez H.González-Ojeda A, et al.Endoscopy. 2004 Apr;36(4):337-41. doi: 10.1055/s-2004-814412.Endoscopy. 2004.PMID: 15057685