NATIONAL MEDICAL JOURNAL OF CHINA, Volume 81, Issue 12,2001, Pages 705-708, doi:10.3760/j:issn:0376-2491.2001.12.001
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 81, Issue 12,2001, Pages 715-718, doi:10.3760/j:issn:0376-2491.2001.12.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 81, Issue 12,2001, Pages 714, doi:10.3760/j:issn:0376-2491.2001.12.024
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 81, Issue 12,2001, Pages 722-725, doi:10.3760/j:issn:0376-2491.2001.12.006
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 81, Issue 12,2001, Pages 757-758, doi:10.3760/j:issn:0376-2491.2001.12.017