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Pollak KI, Krause KM, Yarnall KS, Gradison M, Michener JL, Østbye T.Pollak KI, et al. Among authors: michener jl.BMC Health Serv Res. 2008 Dec 1;8:245. doi: 10.1186/1472-6963-8-245.BMC Health Serv Res. 2008.PMID: 19046443Free PMC article.