Rescue analgesia with a transversus abdominis plane block alleviates moderate-to-severe pain and improves oxygenation after abdominal surgery: a randomized controlled trial - He, Jingxian; Qin, Shuai; Wang, Yuwen; Ye, Qiuping; Wang, Penglei; Zhang, Ye; Wu, Yun (Frontiers in Pain Research, 2024)