Khalili, N., K. Karvandian, H. Eftekhar Ardebili, N. Eftekhar, and O. Nabavian. “Predictive Factors of Preoperative Anxiety in the Anesthesia Clinic: A Survey of 231 Surgical Candidates”. Archives of Anesthesiology and Critical Care, Vol. 5, no. 4, Sept. 2019, pp. 122-7, doi:10.18502/aacc.v5i4.1452.