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Myers RP, Leung Y, Shaheen AA, Li B.Myers RP, et al.BMC Health Serv Res. 2007 Oct 2;7:159. doi: 10.1186/1472-6963-7-159.BMC Health Serv Res. 2007.PMID: 17910762Free PMC article.
Myers RP, Li B, Fong A, Shaheen AA, Quan H.Myers RP, et al.BMC Public Health. 2007 Jul 5;7:143. doi: 10.1186/1471-2458-7-143.BMC Public Health. 2007.PMID: 17615056Free PMC article.