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Pellegrini CA, Hoffman SA, Collins LM, Spring B.Pellegrini CA, et al. Among authors: collins lm.Contemp Clin Trials. 2014 Jul;38(2):251-9. doi: 10.1016/j.cct.2014.05.007. Epub 2014 May 17.Contemp Clin Trials. 2014.PMID: 24846621Free PMC article.Clinical Trial.