NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 1,1998, , doi:10.3760/j:issn:0376-2491.1998.01.024
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 1,1998, , doi:10.3760/j:issn:0376-2491.1998.01.032
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 1,1998, , doi:10.3760/j:issn:0376-2491.1998.01.038
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 1,1998, , doi:10.3760/j:issn:0376-2491.1998.01.021
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 78, Issue 1,1998, , doi:10.3760/j:issn:0376-2491.1998.01.015