McMahon, S 
Wall and Melzack's textbook of pain.   Textbook of pain    - Sixth edition /  edited by Stephen McMahon, FMEDsCI, FSB, Irene Tracey, MA(Oxon), PhD, FRCA, Martin Koltzenburg, MD, FRCP, Dennis C. Turk, PhD.   - Philadelphia, PA :  Elsevier Saunders,  [2013]   - xxix, 1153 pages :  illustrations (black and white, and colour) ;  29 cm