1. Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy
2. Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Rome, Italy
3. Global Health Research Institute, Istituto di Igiene, Università Cattolica del Sacro Cuore, Roma, Italy
4. Clinical Operational Research Unit, University College London, London, UK
5. Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University, Moscow, Russia
6. Inflammation, Repair and Development Section, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, UK
7. Long COVID Kids, UK
8. Coventry University Group, Coventry, UK