MATERNAL AND CHILD HEALTH CARE OF CHINA, Volume 22, Issue 23,2007, Pages 3309-3310, doi:10.3969/j.issn.1001-4411.2007.23.065
MEDICAL RECAPITULATE, Volume 13, Issue 23,2007, Pages 1917-1918, doi:10.3969/j.issn.1006-2084.2007.23.084
CONTINUING MEDICAL EDUCATION, Volume 21, Issue 23,2007, Pages 45, doi:10.3969/j.issn.1004-6763.2007.23.010
HEALTH VOCATIONAL EDUCATION, Volume 25, Issue 23,2007, Pages 123-125, doi:10.3969/j.issn.1671-1246.2007.23.088