CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 3, Issue 04,2000, Pages 195-198, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 3, Issue 04,2000, Pages 199-201, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 3, Issue 04,2000, Pages 202-204, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 3, Issue 04,2000, Pages 205-207, Dol:
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 3, Issue 04,2000, Pages 208-210, Dol: