1. CONGENITAL MALFORMATIONS OF THE AORTIC AND PULMONARY VALVES
2. Quadricuspid semilunar valve
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4. 4) Davia, J.E., Fenoglio, J.J., DeCastro, C.M. et al. : Quadricuspid semilunar valves. Chest 72 : 186-189, 1977.
5. A Case of Quadricuspid Aortic Valve Associated with Single Coronary Ostium.