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Hoel KA, Lichtwarck B, Væringstad A, Feiring IH, Rokstad AMM, Selbæk G, Benth JŠ, Bergh S.Hoel KA, et al. Among authors: rokstad amm.BMC Health Serv Res. 2022 Mar 29;22(1):415. doi: 10.1186/s12913-022-07830-9.BMC Health Serv Res. 2022.PMID: 35351124Free PMC article.Clinical Trial.