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Shinn E, Basen-Engquist K, Le T, Hansis-Diarte A, Bostic D, Martinez-Cross J, Santos A, Follen M.Shinn E, et al.Prev Med. 2004 Aug;39(2):404-12. doi: 10.1016/j.ypmed.2004.02.004.Prev Med. 2004.PMID: 15226053