[1] Univ Leuven, KU Leuven, Dept Publ Hlth & Primary Care, Kapucijnenvoer 35 PB7001, B-3000 Leuven, Belgium
[2] Univ Gothenburg, Inst Hlth & Care Sci, Arvid Wallgrens backe 1, S-41346 Gothenburg, Sweden
[3] Univ Cape Town, Dept Paediat & Child Hlth, Klipfontein Rd, ZA-7700 Cape Town, South Africa
[4] Univ Leuven, KU Leuven, Dept Cardiovasc Sci, Kapucijnenvoer 35 PB7001, B-3000 Leuven, Belgium
[5] Univ Hosp Leuven, Div Congenital & Struct Cardiol, Herestr 49, B-3000 Leuven, Belgium
[6] Res Fdn Flanders FWO, Leuvenseweg 38, B-1000 Brussels, Belgium