Chinese Journal of Preventive Medicine, , Issue 7,2015, Pages 649-653, doi:10.3760/cma.j.issn.0253-9624.2015.07.014
Chinese Journal of Preventive Medicine, , Issue 7,2015, Pages 595-599, doi:10.3760/cma.j.issn.0253-9624.2015.07.004
Chinese Journal of Preventive Medicine, , Issue 7,2015, Pages 659-664, doi:10.3760/cma.j.issn.0253-9624.2015.07.017