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18. [Echocardiography]. Andriange M Rev Med Liege; 1974 Apr; 29(7):193-201. PubMed ID: 4856619 [No Abstract] [Full Text] [Related]
19. Clinical applications of echocardiographic studies of the mitral valve. A review. Paquay P; Lawrence C; Nelson R Acta Cardiol; 1977; 32(3):203-24. PubMed ID: 337742 [TBL] [Abstract][Full Text] [Related]