SHANDONG MEDICAL JOURNAL, Volume 47, Issue 26,2007, Pages 62-64, doi:10.3969/j.issn.1002-266X.2007.26.028
SCIENCE & TECHNOLOGY INFORMATION, , Issue 26,2007, Pages 2, doi:10.3969/j.issn.1672-3791.2007.26.002
CHINA PRACTICAL MEDICINE, Volume 2, Issue 26,2007, Pages 126, doi:10.3969/j.issn.1673-7555.2007.26.100
MATERNAL AND CHILD HEALTH CARE OF CHINA, Volume 22, Issue 26,2007, Pages 3740-3741, doi:10.3969/j.issn.1001-4411.2007.26.062