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2. Blood fibrinolytic activity, social class and habitual physical activity II: a study of black and white men in Southern Georgia;SZCZCKLIK, A.; DISCHINGER, P.; KUEPPERS, F.; TYROLER, H.A.; HAMES, C.G.; CASSEL, J.C.; CREAGAN, S.;Journal of Chronic Disease,1980
3. Epidemiology of Diabetes and its Vascular Complications. Elsevier, New York. WHO MULTINATIONAL STUDY OF VASCULAR DISEASE;WEST, K.M.;IN DIABETES,1978