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Davis SM, Clay T, Smyth M, Gittelsohn J, Arviso V, Flint-Wagner H, Rock BH, Brice RA, Metcalfe L, Stewart D, Vu M, Stone EJ.Davis SM, et al.Prev Med. 2003 Dec;37(6 Pt 2):S24-34. doi: 10.1016/j.ypmed.2003.08.011.Prev Med. 2003.PMID: 14636806Free PMC article.Clinical Trial.
Gittelsohn J, Merkle S, Story M, Stone EJ, Steckler A, Noel J, Davis S, Martin CJ, Ethelbah B.Gittelsohn J, et al.Prev Med. 2003 Dec;37(6 Pt 2):S97-106. doi: 10.1016/j.ypmed.2003.08.010.Prev Med. 2003.PMID: 14636814
Steckler A, Ethelbah B, Martin CJ, Stewart D, Pardilla M, Gittelsohn J, Stone E, Fenn D, Smyth M, Vu M.Steckler A, et al.Prev Med. 2003 Dec;37(6 Pt 2):S80-90. doi: 10.1016/j.ypmed.2003.08.002.Prev Med. 2003.PMID: 14636812