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Malaty HM, el-Zimaity HM, Genta RM, Klein PD, Graham DY.Malaty HM, et al. Among authors: klein pd.Helicobacter. 1996 Sep;1(3):165-7. doi: 10.1111/j.1523-5378.1996.tb00032.x.Helicobacter. 1996.PMID: 9398899
Graham DY, Klein PD, Opekun AR, Boutton TW.Graham DY, et al. Among authors: klein pd.J Infect Dis. 1988 Apr;157(4):777-80. doi: 10.1093/infdis/157.4.777.J Infect Dis. 1988.PMID: 3346569
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Anand BS, Raed AK, Malaty HM, Genta RM, Klein PD, Evans DJ Jr, Graham DY.Anand BS, et al. Among authors: klein pd.Am J Gastroenterol. 1996 Jun;91(6):1112-5.Am J Gastroenterol. 1996.PMID: 8651154
Klein PD, Malaty HM, Martin RF, Graham KS, Genta RM, Graham DY.Klein PD, et al.Am J Gastroenterol. 1996 Apr;91(4):690-4.Am J Gastroenterol. 1996.PMID: 8677930Clinical Trial.
Graham DY, Runke D, Anderson SY, Malaty HM, Klein PD.Graham DY, et al. Among authors: klein pd.Am J Gastroenterol. 1999 May;94(5):1214-7. doi: 10.1111/j.1572-0241.1999.01069.x.Am J Gastroenterol. 1999.PMID: 10235196
Graham DY, Klein PD.Graham DY, et al. Among authors: klein pd.Gastroenterol Clin North Am. 2000 Dec;29(4):885-93, x. doi: 10.1016/s0889-8553(05)70156-4.Gastroenterol Clin North Am. 2000.PMID: 11190073Review.