NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 2,1998, , doi:10.3760/j:issn:0376-2491.1998.02.036
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 2,1998, , doi:10.3760/j:issn:0376-2491.1998.02.015
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 2,1998, , doi:10.3760/j:issn:0376-2491.1998.02.043
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 2,1998, , doi:10.3760/j:issn:0376-2491.1998.02.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 2,1998, , doi:10.3760/j:issn:0376-2491.1998.02.005