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Ridelberg M, Roback K, Nilsen P, Carlfjord S.Ridelberg M, et al. Among authors: carlfjord s.BMC Health Serv Res. 2016 Mar 21;16:98. doi: 10.1186/s12913-016-1350-5.BMC Health Serv Res. 2016.PMID: 27001079Free PMC article.
Carlfjord S, Öhrn A, Gunnarsson A.Carlfjord S, et al.BMC Health Serv Res. 2018 Feb 14;18(1):113. doi: 10.1186/s12913-018-2876-5.BMC Health Serv Res. 2018.PMID: 29444680Free PMC article.