Chinese Journal of Endemiology, Volume 31, Issue 6,2012, Pages 608-612, doi:10.3760/cma.j.issn.1000-4955.2012.06.005
Chinese Journal of Endemiology, Volume 31, Issue 6,2012, Pages 620-624, doi:10.3760/cma.j.issn.1000-4955.2012.06.008
Chinese Journal of Endemiology, Volume 31, Issue 6,2012, Pages 617-619, doi:10.3760/cma.j.issn.1000-4955.2012.06.007
Chinese Journal of Endemiology, Volume 31, Issue 6,2012, Pages 668-670, doi:10.3760/cma.j.issn.1000-4955.2012.06.020