1. SAD index for clinical assessment of pain;Black,1976
2. Organization and function of a pain clinic;Bonica,1974
3. A ‘Pain Estimate’ model for quantification and classification of chronic pain states;Brena;Anesthesiol. Rev.,1975
4. Pain: A current view of neural mechanisms;Casey;Amer. Sci.,1973
5. Pain viewed as learned behavior;Fordyce,1974