1. Turk DC, Monarch ES. Biopsychosocial perspective on chronic pain. In: Turk DC, Gatchel RJ, editors. Psychological approaches to pain management. 2nd ed. New York: Guildford Press; 1995.
2. Merskey H, Bogduk N. Classification of chronic pain, IASP Task Force on Taxonomy. Seattle: IASP Press; 1994.
3. Pincus T, Vlaeyen JW, Kendall NA, et al. Cognitive-behavioral therapy and psychosocial factors in low back pain: directions for the future. Spine. 2002;27(5):E133–8.
4. Bullingham A, Strunin L. Prevention of postoperative venous thromboembolism. Br J Anaesth. 1995;75:622–30.
5. Carr ECJ, Thomas VN, Wilson-Barnet J. Patient experiences of anxiety, depression and acute pain after surgery: a longitudinal perspective. Int J Nurs Stud. 2005;42(5):521–30.