LGE-MRI scans were done on clinical scanners (Siemens Healthcare, Erlangen, Germany) 15 minutes after injection of contrast agent (0.1 mmol/kg, Multihance, Bracco Diagnostic Inc., Princeton, NJ) using an institutional standard inversion recovery prepared, 3-D gradient echo pulse sequence as described 22 (link). The LGE-MRI scans were acquired with a voxel size of 1.25 mm x 1.25 mm x 2.5 mm and reconstructed to voxel spacing of 0.625 mm x 0.625 mm x 1.25 mm.