Subtle structural abnormalities in genotype positive phenotype ‘negative’ patients with pre-clinical hypertrophic cardiomyopathy (HCM): a blinded, controlled cardiovascular magnetic resonance (CMR) study - Deva Djeven; Gruner Christiane; Care Melanie; Wintersperger Bernd J; Rakowski Harry; Crean Andrew M (Journal of Cardiovascular Magnetic Resonance, 2012)