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APA Citation
Xu, X., Rao, Y., Deng, S., Liu, S., Guo, J. J., Sharma, M., & Zhao, Y. (n.d.). current smoking in pregnant women in five geographical areas of China: a cross-sectional survey. Lancet, 388, S97–. http://access.bl.uk/ark:/81055/vdc_100038840277.0x00004a