1. Fondazione G. Monasterio CNR‐Regione Toscana Massa and Pisa Italy
2. Institute of Clinical Physiology Pisa Italy
3. Adult and Pediatric Cardiac Surgery Dept. Advanced Biomedical Sciences University of Naples “Federico II” Naples Italy
4. Helen B. Taussig Heart Center Johns Hopkins Hospital and School of Medicine Baltimore MD USA
5. Division of Pediatric Cardiology Department of Pediatrics Medical University Graz Graz Austria