NATIONAL MEDICAL JOURNAL OF CHINA, Volume 80, Issue 12,2000, Pages 919, doi:10.3760/j:issn:0376-2491.2000.12.015
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 80, Issue 12,2000, Pages 943, doi:10.3760/j:issn:0376-2491.2000.12.023
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 80, Issue 12,2000, Pages 951, doi:10.3760/j:issn:0376-2491.2000.12.026
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 80, Issue 12,2000, Pages 931, doi:10.3760/j:issn:0376-2491.2000.12.020
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 80, Issue 12,2000, Pages 922, doi:10.3760/j:issn:0376-2491.2000.12.017