CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 30, Issue 22,2007, Pages 3-6, doi:10.3760/cma.j.issn.1673-4904.2007.22.002
CHINESE MEDICAL JOURNAL, Volume 120, Issue 22,2007, Pages 2049-2052,
MATERNAL AND CHILD HEALTH CARE OF CHINA, Volume 22, Issue 22,2007, Pages 3143-3144, doi:10.3969/j.issn.1001-4411.2007.22.053
ACTA CHIMICA SINICA, Volume 65, Issue 22,2007, Pages 2544-2548, doi:10.3321/j.issn:0567-7351.2007.22.008