Epidemiological characteristics of Classes A and B infectious diseases among people aged 60 years and over in Xiangzhou District, Xiangyang, 2006—2015
LI Zhi-fang, LI Chang-hui,YAO Xiu-hua
S China J Prev Med . 2017, (5): 442 -445 .  DOI: 10.13217/j.scjpm.2017.0442

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