1 Division for Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Croatia.
2 Division for Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Croatia; Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton & Harefield Hospitals, National Heart and Lung Institute, Imperial College, London, UK; Department of Medical Rehabilitation, Medical Faculty, University of Rijeka, Croatia. Electronic address: margarita.brida@icloud.com.