NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 40,2007, Pages 2811-2813, doi:10.3760/j.issn:0376-2491.2007.40.002
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 40,2007, Pages 2836, doi:10.3760/j.issn:0376-2491.2007.40.023
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 40,2007, Pages 2852-2855, doi:10.3760/j.issn:0376-2491.2007.40.013
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 40,2007, Pages 2829-2832, doi:10.3760/j.issn:0376-2491.2007.40.006