[文献资料]参 考 文 献

Melzack R，B é langer E . Labour pain：correlations with menstrual pain and acute low-back pain before and during pregnancy .The Risk of Cesarean Delivery with Neuraxial Analgesia Given Early versus Late in Labor . Volume NEJM，2005，35 2.5 .夏云.目前产科麻醉中的热点讨论.国 ......