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Stentzel U, Piegsa J, Fredrich D, Hoffmann W, van den Berg N.Stentzel U, et al. Among authors: fredrich d.BMC Health Serv Res. 2016 Oct 19;16(1):587. doi: 10.1186/s12913-016-1839-y.BMC Health Serv Res. 2016.PMID: 27756338Free PMC article.
Stentzel U, Bahr J, Fredrich D, Piegsa J, Hoffmann W, van den Berg N.Stentzel U, et al. Among authors: fredrich d.BMC Health Serv Res. 2018 May 3;18(1):322. doi: 10.1186/s12913-018-3143-5.BMC Health Serv Res. 2018.PMID: 29724199Free PMC article.