CHINA MEDICAL HERALD, Volume 4, Issue 19,2007, Pages 168-170, doi:10.3969/j.issn.1673-7210.2007.19.124
CHINA PRACTICAL MEDICINE, Volume 2, Issue 19,2007, Pages 118, doi:10.3969/j.issn.1673-7555.2007.19.103
CHINESE JOURNAL OF SURGERY, Volume 45, Issue 19,2007, Pages 1354-1358, doi:10.3760/j.issn:0529-5815.2007.19.018
HEALTH VOCATIONAL EDUCATION, Volume 25, Issue 19,2007, Pages 44-45, doi:10.3969/j.issn.1671-1246.2007.19.026
MATERNAL AND CHILD HEALTH CARE OF CHINA, Volume 22, Issue 19,2007, Pages 2651-2653, doi:10.3969/j.issn.1001-4411.2007.19.023