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Xi, Bo and Liang, Yajun and Liu, Yunxia and Yan, Yinkun and Zhao, Min and Ma, Chuanwei and Bovet, Pascal (2016) Tobacco use and second-hand smoke exposure in young adolescents aged 12–15 years: data from 68 low-income and middle-income countries. The Lancet Global Health, 4 (11). e795-e805. ISSN 0140-6736