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Bigham JM, Rice TM, Pande S, Lee J, Park SH, Gutierrez N, Ragland DR.Bigham JM, et al. Among authors: ragland dr.Int J Health Geogr. 2009 Dec 29;8:72. doi: 10.1186/1476-072X-8-72.Int J Health Geogr. 2009.PMID: 20040106Free PMC article.