Pirotesak, S., Neti, W., Weerapong, P., Teeravidja, B., Pangthipampai , P. . and Sirivanasandha, B. (2024) “Risk Factors for Intraoperative Hypotension in Elderly Patients Undergoing Fast Track Hip Fracture Surgery under Spinal Anesthesia: A Retrospective Observational Study”, Siriraj Medical Journal, 76(7), pp. 454–464. doi: 10.33192/smj.v76i7.269205.