A Comparative Study on the Effect of Intravenous Hydrocortisone and Ketamine on Reducing Shivering after Spinal Anesthesia in Cesarean Section: A Double-blind Randomized Controlled Trial - Manouchehrian, Nahid; Sanatkar, Mehdi; Kimiaei Asadi, Hossein; Soleimani, Elahe; Moradi, Abbas (Archives of Anesthesiology and Critical Care, 2018)