NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 3,1998, , doi:10.3760/j:issn:0376-2491.1998.03.026
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 3,1998, , doi:10.3760/j:issn:0376-2491.1998.03.019
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 3,1998, , doi:10.3760/j:issn:0376-2491.1998.03.024
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 3,1998, , doi:10.3760/j:issn:0376-2491.1998.03.028
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 3,1998, , doi:10.3760/j:issn:0376-2491.1998.03.007