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	1.	Vulnerability to HIV infection and related health risk behaviors of the out of school adolescents migrated with their parents to Beijing. [electronic resource] by Ma, Ying-Hua Ding, Su-Qin Wang, Chao Producer: 20090129 In: Biomedical and environmental sciences : BES vol. 21 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	[Human immunodeficiency virus vulnerabilities and related health risk behaviors of out-of-school children of the floating population in Beijing]. [electronic resource] by Ma, Ying-hua Ding, Su-qin Wang, Chao Producer: 20140502 In: Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences vol. 39 Availability: No items available. Save to lists Add to cart (remove)
	3.	[The community health diagnosis of life-way disease in Peking University Health Science Center]. [electronic resource] by Han, Fang-qun Ma, Ying-hua Ding, Su-qin Guo, Qi Li, Hai-feng Producer: 20080527 In: Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences vol. 38 Availability: No items available. Save to lists Add to cart (remove)

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