CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 2,1999, Pages 151-153, doi:10.3760/cma.j.issn.1000-4955.1999.02.025
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 2,1999, Pages 157-158, doi:10.3760/cma.j.issn.1000-4955.1999.02.037
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 2,1999, Pages 101-103, doi:10.3760/cma.j.issn.1000-4955.1999.02.007
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 2,1999, Pages 118-119, doi:10.3760/cma.j.issn.1000-4955.1999.02.013
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 18, Issue 2,1999, Pages 112-115, doi:10.3760/cma.j.issn.1000-4955.1999.02.011