1. Department of Cardiology III – Adult Congenital and Valvular Heart Disease, University Hospital Muenster, Albert-Schweitzer Campus 1, Muenster, Germany
2. Adult Congenital Heart Centre and National Centre for Pulmonary Arterial Hypertension, Royal Brompton and Harefield NHS Trust, Sydney Street, SW3 6NP London, UK
3. School of Cardiovascular Medicine & Sciences, Kings College, WC2R 2LS London, UK
4. National Heart & Lung Institute, Imperial College, Dovehouse Street, SW3 6LY London, UK
5. Aristotle University Medical School, Thessaloniki, Greece
6. Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
7. Ahmanson/UCLA Adult Congenital Heart Center, 100 UCLA Medical Plaza, Suite 630 East, Los Angeles, CA 90095, USA
8. Division for Adult Congenital Heart Disease, Department of Cardiovascular Diseases, University Hospital Centre Zagreb, Kispaticeva 12, 10000 Zagreb, Croatia
9. Center of Congenital Heart Disease, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 18, 3010 Bern, Switzerland
10. ACHD Unit, Pediatric and Adult Congenital Heart Centre, IRCCS-Policlinico San Donato, Piazza Edmondo Malan, 2, 20097 San Donato Milanese MI, Italy
11. ACHD Unit, Erasmus Medical Center, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands