NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 25,2007, Pages 1734-1737, doi:10.3760/j:issn:0376-2491.2007.25.002
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 25,2007, Pages 1755-1757, doi:10.3760/j:issn:0376-2491.2007.25.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 25,2007, Pages 1758-1760, doi:10.3760/j:issn:0376-2491.2007.25.009
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 25,2007, Pages 1786-1788, doi:10.3760/j:issn:0376-2491.2007.25.016
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 25,2007, Pages 1742-1745, doi:10.3760/j:issn:0376-2491.2007.25.004