NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 5,1998, , doi:10.3760/j:issn:0376-2491.1998.05.033
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 5,1998, , doi:10.3760/j:issn:0376-2491.1998.05.025
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 5,1998, , doi:10.3760/j:issn:0376-2491.1998.05.032
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 5,1998, , doi:10.3760/j:issn:0376-2491.1998.05.016
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 5,1998, , doi:10.3760/j:issn:0376-2491.1998.05.002