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2. Behavioral Methods for Chronic Pain and Illness;Fordyce,1976
3. Behavioral approaches to treatment of chronic pain: the inaccuracy of patient self-report measures;Kremer;Arch. phys. Med. Rehab.,1981
4. Drug abuse and dependency in patients with chronic pain;Maruta,1979
5. Self-reported vs. actual use of medications in chronic pain patients;Ready;Pain,1982