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Goth US, Hammer HL, Claussen B.Goth US, et al. Among authors: claussen b.Int J Environ Res Public Health. 2014 Mar 21;11(3):3375-86. doi: 10.3390/ijerph110303375.Int J Environ Res Public Health. 2014.PMID: 24662997Free PMC article.
Johannessen HA, Dieserud G, Claussen B, Zahl PH.Johannessen HA, et al. Among authors: claussen b.BMC Health Serv Res. 2011 Mar 28;11:68. doi: 10.1186/1472-6963-11-68.BMC Health Serv Res. 2011.PMID: 21443801Free PMC article.