Zabetian, H., Damshenas, M.H. , Kalani, N., Ghaedi, M., Taheri, L., Mosavi, S.S. and Sanie Jahromi, M.S. 2022. A Comparative Study of Immediate and Delayed Supine Position on Hemodynamic Changes of Patients Undergoing Hemorrhoid and Fischer Surgery under Spinal Anesthesia. Iranian Journal of Emergency Medicine. 9, 1 (Nov. 2022), e37. DOI:https://doi.org/10.22037/ijem.v9i1.39921.