1. Theunissen M, Peters ML, Bruce J, Gramke HF, Marcus MA. Preoperative anxiety and catastrophizing: a systematic review and meta-analysis of the association with chronic postsurgical pain. Clin J Pain. 2012;28(9):819–41.
2. Rodin G, Voshart K. Depression in the medically ill: an overview. Am J Psychiatry. 1986;143:696–705.
3. Valenzuela Millán J, Barrera Serrano JR, Ornelas Aguirre JM. Anxiety in preoperative anesthetic procedures. Cir Cir. 2010;78(2):147–51.
4. Colon EA, Popkin MK. Anxiety and panic. In: Rundell JR, Wise MG, editors. Textbook of consultation-liaison psychiatry. Washington, DC: American Psychiatric Press; 1996. p. 402–25.
5. Surman OS. The surgical patient. In: Hackett TP, Cassem NH, editors. Massachusetts General Hospital handbook of general hospital psychiatry. 2nd ed. Littleton: PSG Publishing; 1987. p. 69–83.