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Psychophysical responses to a speech stressor: correlation of plasma beta-endorphin levels at rest and after psychological stress with thermally measured pain threshold in patients with coronary artery disease.
Sheps DS, Ballenger MN, De Gent GE, Krittayaphong R, Dittman E, Maixner W, McCartney W, Golden RN, Koch G, Light KC. Sheps DS, et al. Among authors: ballenger mn. J Am Coll Cardiol. 1995 Jun;25(7):1499-503. doi: 10.1016/0735-1097(95)00045-6. J Am Coll Cardiol. 1995. PMID: 7759697 Free article.
Relation between systemic hypertension and pain perception.
Sheps DS, Bragdon EE, Gray TF 3rd, Ballenger M, Usedom JE, Maixner W. Sheps DS, et al. Among authors: ballenger m. Am J Cardiol. 1992 Nov 16;70(16):3F-5F. doi: 10.1016/0002-9149(92)90181-w. Am J Cardiol. 1992. PMID: 1442599
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