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Ponce J, Beltrán B, Ponce M, Zapardiel J, Ortiz V, Vegazo O, Nuevo J; Members of the IBERGE study group.Ponce J, et al. Among authors: ortiz v.Eur J Gastroenterol Hepatol. 2009 Jun;21(6):620-9. doi: 10.1097/MEG.0b013e328310abe9.Eur J Gastroenterol Hepatol. 2009.PMID: 19282765
Ponce M, Ortiz V, Juan M, Garrigues V, Castellanos C, Ponce J.Ponce M, et al. Among authors: ortiz v.Am J Surg. 2003 Jun;185(6):560-4. doi: 10.1016/s0002-9610(03)00076-x.Am J Surg. 2003.PMID: 12781886