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2. Pathology of Cardiac Valves;Davies,1980
3. Aging changes in the aortic and mitral valves;Sell;Am J Pathol,1956
4. Principles of the pathogenesis of atherosclerosis;Wissler,1984
5. Congenital bicuspid aortic valve after age 20;Fenoglio;Am J Cardiol,1977