Participating specialised centres across Europe
| Participating centre | Country |
| Marien Hospital | Germany |
| Anna Meyer Children’s University Hospital | Italy |
| Sapienza University of Rome | Italy |
| Emma Childrens Hospital AMC | The Netherlands |
| Erasmus MC–Sophia Children’s Hospital | The Netherlands |
| Oslo University Hospital | Norway |
| Hospital de Santa Maria | Portugal |
| Marmara University Faculty of Medicine Pendik Hospital | Turkey |
| Royal Brompton Hospital | UK |
| Royal Hospital for Sick Children, Edinburgh | UK |
| Royal London Hospital | UK |