The authors apologise that upon publication of this article the gender distribution information for table 1 was not included. The full table should appear as follows:
LVEDVi = indexed LV end-diastolic volume; LVEF = LV ejection fraction; LVESVi = indexed LV end-systolic volume; PVR = pulmonary valve replacement; RVEDVi = indexed RV end-diastolic volume; RVEF = RV ejection fraction; RVESVi = indexed RV end-systolic volume; TOF = tetralogy of Fallot. *Greater than 95th percentile, # less that 5th percentile of reference ranges obtained from healthy young adults by Le Ven et al.12