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Pain: An unpleasant sensory and emotional experience associated with actual or potential tissue damageor described in terms of such damage. . Merskey H, Albe-Fessard D, Bonica JJ, Carmon A, Dubner R, Kerr FWL, Lindblom U, Mumford JM, Nathan PW, Noordenbos W, Pagni CA, Renaer MJ, Sternbach RA, Sun
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