1 Department of Congenital Heart Disease and Pediatric Cardiology, German Heart Center, 80636 Munich, Germany.
2 Department of Pediatric Cardiology, Department of Woman's and Children's Health Karolinska Institute, Karolinska University Hospital, 17176 Stockholm, Sweden.
3 Institute of Preventive Pediatrics, Faculty of Sport and Health Sciences, Technical University of Munich, 80992 Munich, Germany.