NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 42,2007, Pages 2960-2964, doi:10.3760/j.issn:0376-2491.2007.42.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 42,2007, Pages 2964, doi:10.3760/j.issn:0376-2491.2007.42.024
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 42,2007, Pages 2997-3000, doi:10.3760/j.issn:0376-2491.2007.42.013
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 42,2007, Pages 2996,