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Ziff MA, Willard N, Harper GW, Bangi AK, Johnson J, Ellen JM.Ziff MA, et al. Among authors: harper gw.Glob J Community Psychol Pract. 2010 Jan;1(1):32-39. doi: 10.7728/0101201004.Glob J Community Psychol Pract. 2010.PMID: 21152354Free PMC article.