Summary of Severe Paediatric Asthma Collaborative in Europe participating centres and the number of children with severe asthma recruited from each centre
| Hospital | City, country | Number of children recruited |
| Anna Meyer Children's University Hospital | Florence, Italy | 10 |
| Emma Children's Hospital AMC | Amsterdam, The Netherlands | 9 |
| Erasmus MC-Sophia Children's Hospital | Rotterdam, The Netherlands | 11 |
| Marien Hospital | Wesel, Germany | 11 |
| Marmara University Faculty of Medicine Pendik Hospital | Pendik, Turkey | 2 |
| Oslo University Hospital | Oslo, Norway | 7 |
| Sapienza University of Rome | Rome, Italy | 5 |
| Royal Brompton Hospital | London, UK | 10 |
| Royal Hospital for Sick Children | Edinburgh, UK | 6 |
| Royal London Hospital | London, UK | 9 |