Aortic root dilatation in adults with surgically repaired tetralogy of fallot: a multicenter cross-sectional study. - Mongeon FP; Gurvitz MZ; Broberg CS; Aboulhosn J; Opotowsky AR; Kay JD; Valente AM; Earing MG; Lui GK; Fernandes SM; Gersony DR; Cook SC; et al. (Circulation, 2013)