Chinese Journal of Preventive Medicine, Volume 47, Issue 7,2013, Pages 612-615, doi:10.3760/cma.j.issn.0253-9624.2013.07.008
Chinese Journal of Preventive Medicine, Volume 47, Issue 7,2013, Pages 632-636, doi:10.3760/cma.j.issn.0253-9624.2013.07.012
Chinese Journal of Preventive Medicine, Volume 47, Issue 7,2013, Pages 661-664, doi:10.3760/cma.j.issn.0253-9624.2013.07.019
Chinese Journal of Preventive Medicine, Volume 47, Issue 7,2013, Pages 637-640, doi:10.3760/cma.j.issn.0253-9624.2013.07.013
Chinese Journal of Preventive Medicine, Volume 47, Issue 7,2013, Pages 641-647, doi:10.3760/cma.j.issn.0253-9624.2013.07.014