NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 25,2006, Pages 1759-1763, doi:10.3760/j:issn:0376-2491.2006.25.010
SHANDONG MEDICAL JOURNAL, Volume 46, Issue 25,2006, Pages 6-8, doi:10.3969/j.issn.1002-266X.2006.25.003
CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 29, Issue 25,2006, Pages 42-43, doi:10.3760/cma.j.issn.1673-4904.2006.25.017
CHINA MEDICAL HERALD, Volume 3, Issue 25,2006, Pages 42-43, doi:10.3969/j.issn.1673-7210.2006.25.014