In vivo diffusion tensor MRI of the human heart: Reproducibility of breath-hold and navigator-based approaches - Nielles-Vallespin,S; Mekkaoui,C; Gatehouse,P; Reese,TG; Keegan,J; Ferreira,PF; Collins,S; Speier,P; Feiweier,T; Silva,R; others (Magnetic resonance in medicine, 2013)