Novel quantification of extracellular expansion by cardiac magnetic resonance is a robust marker in diagnosis of cardiac amyloidosis - Watanabe Eri; Seabra Luciana F; Coelho-Filho Otavio; Jerosch-Herold Michael; Mongeon Francois-Pierre; Blankstein Ron; Kwong Raymond Y (Journal of Cardiovascular Magnetic Resonance, 2011)