1. Department of Molecular & Clinical Medicine/Cardiology, Sahlgrenska Academy, University of Gothenburg , Blå stråket 5B, SE-41345 Gothenburg , Sweden
2. Department of Medicine, Geriatrics and Emergency Medicine, Region Västra Götaland, Sahlgrenska University Hospital/Östra , Smörslottsgatan 1, SE-416 85 Gothenburg , Sweden
3. Adult Congenital Heart Centre and Centre for Pulmonary Hypertension Royal Brompton Hospital, Guys and St Thomas' NHS Trust, Sydney Street, London SW3 6NP , United Kingdom
4. Imperial College for Science and Medicine, London SW3 6LY , United Kingdom
5. Adult Congenital Heart Unit, Department of Medicine, Sahlgrenska University Hospital , Diagnosvägen 11, SE-41650 Gothenburg , Sweden