Comparing perioperative outcomes between regional anesthesia and general anesthesia in patients undergoing hip fracture surgery: a systematic review and meta-analysis. - Liu S; Chen J; Shi H; Li J; Zeng G; Liu W; Hu W; Li S; Gao W; Song W; Liang A; Chen Y (Canadian journal of anaesthesia = Journal canadien d'anesthesie, 2024)