CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 9, Issue 05,2006, Pages 291-293, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 9, Issue 05,2006, Pages 294-296, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 9, Issue 05,2006, Pages 297-300,插图5-1, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 9, Issue 05,2006, Pages 301-305,插图5-1, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 9, Issue 05,2006, Pages 306-308, Dol: