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O'Brien KK, Bayoumi AM, Strike C, Young NL, Davis AM.O'Brien KK, et al.Health Qual Life Outcomes. 2008 Oct 4;6:76. doi: 10.1186/1477-7525-6-76.Health Qual Life Outcomes. 2008.PMID: 18834538Free PMC article.
O'Brien KK, Bayoumi AM, Strike C, Young NL, King K, Davis AM.O'Brien KK, et al.Health Qual Life Outcomes. 2010 Aug 19;8:88. doi: 10.1186/1477-7525-8-88.Health Qual Life Outcomes. 2010.PMID: 20723244Free PMC article.