1. Service of Cardiology (T.R., E.E., O.M., J.B., P.Y.), Lausanne University Hospital and University of Lausanne, Switzerland.
2. Division of Pulmonology (J.-D.A.), Lausanne University Hospital and University of Lausanne, Switzerland.
3. Pediatric Cardiology Unit and Centre Universitaire Romand de Cardiologie et Chirurgie Cardiaque Pédiatrique, Children’s University Hospitals, Lausanne and Geneva, Switzerland (M.B.).