NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 21,2006, Pages 1489-1492, doi:10.3760/j:issn:0376-2491.2006.21.012
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 21,2006, Pages 1470-1473, doi:10.3760/j:issn:0376-2491.2006.21.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 21,2006, Pages 1509-1511, doi:10.3760/j:issn:0376-2491.2006.21.019
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 21,2006, Pages 1494-1497, doi:10.3760/j:issn:0376-2491.2006.21.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 21,2006, Pages 1505-1508, doi:10.3760/j:issn:0376-2491.2006.21.018