Fu, H., Zhong, C., Fu, Y., Gao, Y., & Xu, X. (2020). Perioperative Analgesic Effects of Preemptive Ultrasound-Guided Rectus Sheath Block Combined with Butorphanol or Sufentanil for Single-Incision Laparoscopic Cholecystectomy: A Prospective, Randomized, Clinical Trial. J Pain Res.

Fu, Huimin, Chaochao Zhong, Yu Fu, Yongtao Gao, and Xingguo Xu. "Perioperative Analgesic Effects of Preemptive Ultrasound-Guided Rectus Sheath Block Combined With Butorphanol or Sufentanil for Single-Incision Laparoscopic Cholecystectomy: A Prospective, Randomized, Clinical Trial." J Pain Res 2020.

Fu, Huimin, et al. "Perioperative Analgesic Effects of Preemptive Ultrasound-Guided Rectus Sheath Block Combined With Butorphanol or Sufentanil for Single-Incision Laparoscopic Cholecystectomy: A Prospective, Randomized, Clinical Trial." J Pain Res 2020.