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Preventive Medicine  2019, Vol. 31 Issue (6): 541-544,548    DOI: 10.19485/j.cnki.issn2096-5087.2019.06.001
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Abuse or dependence of narcotic drugs and psychotropic drugs inhospital patients
WANG Lei-zhen*, XING Yi, HUANG Xin-jie, LIAN Zhi, JIA Zhong-wei
* School of Public Health, Peking University, Beijing100191, China