CP and coronary artery disorder: Comparing monozygotic and dizygotic twins with CAD, we found no differences regarding NCP volume (dizygotic, 107 [52–178] mm3 versus monozygotic, 79 [36–175] mm3; P=0.5) and CP volume (dizygotic, 43 [7–65] mm3 versus monozygotic, 18 [5–84] mm3, P=0.4).