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Waasdorp TE, Pas ET, O'Brennan LM, Bradshaw CP.Waasdorp TE, et al. Among authors: o brennan lm.J Sch Violence. 2011 Jan 1;10(2):115-132. doi: 10.1080/15388220.2010.539164.J Sch Violence. 2011.PMID: 21552337Free PMC article.