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Barth H, Klein R, Berg PA, Wiedenmann B, Hopf U, Berg T.Barth H, et al. Among authors: klein r.Hepatogastroenterology. 2003 Jan-Feb;50(49):201-6.Hepatogastroenterology. 2003.PMID: 12630023Clinical Trial.
Berg CP, Stein GM, Klein R, Pascu M, Berg T, Kammer W, Priemer M, Nordheim A, Schulze-Osthoff K, Gregor M, Wesselborg S, Berg PA.Berg CP, et al. Among authors: klein r.Liver Int. 2006 Sep;26(7):846-55. doi: 10.1111/j.1478-3231.2006.01303.x.Liver Int. 2006.PMID: 16911468
Ndhlovu M, Preuss BE, Dengjel J, Stevanovic S, Weiner SM, Klein R.Ndhlovu M, et al. Among authors: klein r.Brain Behav Immun. 2011 Feb;25(2):279-85. doi: 10.1016/j.bbi.2010.09.019. Epub 2010 Sep 25.Brain Behav Immun. 2011.PMID: 20884345
Nann D, Berg CP, Preuss BE, Klein R.Nann D, et al. Among authors: klein r.BMC Gastroenterol. 2012 Oct 24;12:152. doi: 10.1186/1471-230X-12-152.BMC Gastroenterol. 2012.PMID: 23095491Free PMC article.
Preuß BE, Berg CP, Werner C, Plankenhorn S, Malek NP, Klein R.Preuß BE, et al. Among authors: klein r.BMC Gastroenterol. 2018 May 2;18(1):58. doi: 10.1186/s12876-018-0787-x.BMC Gastroenterol. 2018.PMID: 29720090Free PMC article.