1 Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton Hospital, Guy's and St Thomas's NHS Foundation Trust, United States of America; Cardiology Department, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece.
2 Adult Congenital Heart Disease Department, Guy's and St Thomas's NHS Foundation Trust, United States of America; Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton Hospital, Guy's and St Thomas's NHS Foundation Trust, United Kingdom.
3 Department of Cardiovascular and Pulmonary Sciences, Catholic University of the Sacred Heart, Rome, Italy; Department of Cardiovascular Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
4 Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton Hospital, Guy's and St Thomas's NHS Foundation Trust, United States of America; National Heart and Lung Institute, Imperial College London, United Kingdom. Electronic address: cm098cm098@gmail.com.