Khalili, Nastaran, Kasra Karvandian, Hassan Eftekhar Ardebili, Negar Eftekhar, and Omid Nabavian. “Predictive Factors of Preoperative Anxiety in the Anesthesia Clinic: A Survey of 231 Surgical Candidates”. Archives of Anesthesiology and Critical Care 5, no. 4 (September 21, 2019): 122-127. Accessed August 10, 2020. https://aacc.tums.ac.ir/index.php/aacc/article/view/233.