Chinese Journal of Preventive Medicine, Volume 47, Issue 9,2013, Pages 843-847, doi:10.3760/cma.j.issn.0253-9624.2013.09.015
Chinese Journal of Preventive Medicine, Volume 47, Issue 9,2013, Pages 794-798, doi:10.3760/cma.j.issn.0253-9624.2013.09.006
Chinese Journal of Preventive Medicine, Volume 47, Issue 9,2013, Pages 788-793, doi:10.3760/cma.j.issn.0253-9624.2013.09.005
Chinese Journal of Preventive Medicine, Volume 47, Issue 9,2013, Pages 848-854, doi:10.3760/cma.j.issn.0253-9624.2013.09.016
Chinese Journal of Preventive Medicine, Volume 47, Issue 9,2013, Pages 837-842, doi:10.3760/cma.j.issn.0253-9624.2013.09.014