MEDICAL JOURNAL OF NATIONAL DEFENDING FORCES IN SOUTHWEST CHINA, Volume 19, Issue 12,2009, Pages 1197-1199, doi:10.3969/j.issn.1004-0188.2009.12.012
CHINESE JOURNAL OF GERONTOLOGY, Volume 29, Issue 12,2009, Pages 1556-1556, doi:10.3969/j.issn.1005-9202.2009.12.042