NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 6,2004, Pages 510-513, doi:10.3760/j:issn:0376-2491.2004.06.022
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 6,2004, Pages 445-446, doi:10.3760/j:issn:0376-2491.2004.06.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 6,2004, Pages 446-447, doi:10.3760/j:issn:0376-2491.2004.06.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 6,2004, Pages 469-473, doi:10.3760/j:issn:0376-2491.2004.06.011
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 6,2004, Pages 460-463, doi:10.3760/j:issn:0376-2491.2004.06.009