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Caro JJ, Migliaccio-Walle K, Ishak KJ, Proskorovsky I, O'Brien JA.Caro JJ, et al. Among authors: ishak kj.BMC Health Serv Res. 2006 Aug 14;6:99. doi: 10.1186/1472-6963-6-99.BMC Health Serv Res. 2006.PMID: 16907982Free PMC article.