CardiovascularDiseases,University Hospitals Leuven, Leuven,Belgium; Department ofCardiovascular Sciences,KU Leuven,Herestraat49, B-3000 Leuven, Belgium; SwedishSchoolof Sports and Health Science, and Karolinska University Hospital, Stockholm, Sweden; Pediatric and Adult Congenital Heart Centre, IRCCS—Policlinico San Donato San Donato Milanese, Milan, Italy; Heartcenter of Northrhine Westphalia ...