Keep up to date with the latest news and content from BMC Public Health and BioMed Central.
Da Huo, Lixin Tao, Xia Li, Wei Wang, Zhaoping Wang, Dongning Chen, Huiping Zhu, Xinghua Yang, Yanxia Luo and Xiuhua Guo*
Corresponding author: Xiuhua Guo email@example.com
BMC Public Health 2013, 13:912
BioMed Central Ltd unless otherwise stated. Part of Springer Science+Business Media.