“The relationship between abdominal circumference-to-hip ratio and ephedrine requirement in spinal anesthesia for elective cesarean: A prospective observational study”, Ann Med Res , vol. 30, no. 4, pp. 468–473, Apr. 2023, Accessed: May 11, 2026. [Online]. Available: http://www.annalsmedres.org/index.php/aomr/article/view/4416