Study on ultrasound locating interspinous space of combined spinal and epidural anesthesia in cesarean section
WANG Chang-she, WEN Da-xiang, LI Sheng-hua, et al
上海交通大学学报（医学版） . 2014, (11): 1610 .  DOI: 11.3969/j.issn.1674-8115.2014.11.010