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Wong MD, Chung AK, Boscardin WJ, Li M, Hsieh HJ, Ettner SL, Shapiro MF.Wong MD, et al. Among authors: shapiro mf.Public Health Rep. 2006 Nov-Dec;121(6):746-54. doi: 10.1177/003335490612100615.Public Health Rep. 2006.PMID: 17278410Free PMC article.