NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 47,2007, Pages 3313-3316, doi:10.3760/j.issn:0376-2491.2007.47.001
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 47,2007, Pages 3367-3371, doi:10.3760/j.issn:0376-2491.2007.47.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 47,2007, Pages 3377-3378, doi:10.3760/j.issn:0376-2491.2007.47.017
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 47,2007, Pages 3353-3356, doi:10.3760/j.issn:0376-2491.2007.47.011