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Do high-risk urban youth also have older friends?
Velazquez CE, Pasch KE, Perry CL, Komro KA. Velazquez CE, et al. J Adolesc Health. 2011 May;48(5):467-72. doi: 10.1016/j.jadohealth.2010.08.002. Epub 2010 Nov 24. J Adolesc Health. 2011. PMID: 21501805 Free PMC article.