CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 3,1999, Pages 184-187, doi:10.3760/cma.j.issn.1000-4955.1999.03.008
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 3,1999, Pages 209-210, doi:10.3760/cma.j.issn.1000-4955.1999.03.018
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 3,1999, Pages 224-227, doi:10.3760/cma.j.issn.1000-4955.1999.03.024
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 3,1999, Pages 166-168, doi:10.3760/cma.j.issn.1000-4955.1999.03.003
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 3,1999, Pages 211-212, doi:10.3760/cma.j.issn.1000-4955.1999.03.019