Vosoughian M, Azimaraghi O, Moshari MR, Dahi M, Ghasemi M, Khazaei N. The Effect of Different Combination Doses of Intrathecal Hyperbaric Bupivacaine 0.5% and Sufentanil on the Hemodynamic Profile of Geriatric Patients Undergoing Hip Surgery under Spinal Anesthesia. AJS. 2017;3(3-4):42-45.