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Hiemstra M, Otten R, de Leeuw RN, van Schayck OC, Engels RC.Hiemstra M, et al. Among authors: de leeuw rn.J Adolesc Health. 2011 Jun;48(6):597-603. doi: 10.1016/j.jadohealth.2010.09.011. Epub 2010 Dec 30.J Adolesc Health. 2011.PMID: 21575820