CHINESE JOURNAL OF ENDEMIOLOGY, Volume 22, Issue 5,2003, Pages 414-416, doi:10.3760/cma.j.issn.1000-4955.2003.05.012
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 22, Issue 5,2003, Pages 460-462, doi:10.3760/cma.j.issn.1000-4955.2003.05.030
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 22, Issue 5,2003, Pages 420-421, doi:10.3760/cma.j.issn.1000-4955.2003.05.014
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 22, Issue 5,2003, Pages 417-419, doi:10.3760/cma.j.issn.1000-4955.2003.05.013