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Sepulveda A, Peterson LE, Shelton J, Gutierrez O, Graham DY.Sepulveda A, et al. Among authors: gutierrez o.Am J Gastroenterol. 2002 Jun;97(6):1365-70. doi: 10.1111/j.1572-0241.2002.05667.x.Am J Gastroenterol. 2002.PMID: 12094851
Cassaro M, Rugge M, Gutierrez O, Leandro G, Graham DY, Genta RM.Cassaro M, et al. Among authors: gutierrez o.Am J Gastroenterol. 2000 Jun;95(6):1431-8. doi: 10.1111/j.1572-0241.2000.02074.x.Am J Gastroenterol. 2000.PMID: 10894575
Yamaoka Y, Kikuchi S, el-Zimaity HM, Gutierrez O, Osato MS, Graham DY.Yamaoka Y, et al. Among authors: gutierrez o.Gastroenterology. 2002 Aug;123(2):414-24. doi: 10.1053/gast.2002.34781.Gastroenterology. 2002.PMID: 12145793
Li L, Genta RM, Go MF, Gutierrez O, Kim JG, Graham DY.Li L, et al. Among authors: gutierrez o.Helicobacter. 2002 Dec;7(6):349-55. doi: 10.1046/j.1523-5378.2002.00108.x.Helicobacter. 2002.PMID: 12485121
Hwang IR, Hsu PI, Peterson LE, Gutierrez O, Kim JG, Graham DY, Yamaoka Y.Hwang IR, et al. Among authors: gutierrez o.Helicobacter. 2003 Apr;8(2):142-8. doi: 10.1046/j.1523-5378.2003.00135.x.Helicobacter. 2003.PMID: 12662382
Gutierrez O, Melo M, Segura AM, Angel A, Genta RM, Graham DY.Gutierrez O, et al.Scand J Gastroenterol. 1997 Jul;32(7):664-8. doi: 10.3109/00365529708996515.Scand J Gastroenterol. 1997.PMID: 9246705Clinical Trial.
Yamaoka Y, El-Zimaity HM, Gutierrez O, Figura N, Kim JG, Kodama T, Kashima K, Graham DY.Yamaoka Y, et al. Among authors: gutierrez o.Gastroenterology. 1999 Aug;117(2):342-9. doi: 10.1053/gast.1999.0029900342.Gastroenterology. 1999.PMID: 10419915