1. Department of Woman & Child Health & Public Health, Fondazione Policlinico Universitario A Gemelli IRCCS, Rome, Italy
2. Center for Global Health Research & Studies, Università Cattolica del Sacro Cuore, Roma, Italia
3. Department of Diagnostic Imaging, Hemorrhagic & Thrombotic Diseases Center, Oncological Radiotherapy, & Hematology, Foundation ‘A Gemelli’ IRCCS University Hospital, Rome, Italy
4. Pediatric Section, Department of Surgery, Dentistry, pediatrics, & Gynaecology, University of Verona, Verona, Italy
5. Patient author, Italy
6. Patient author, UK & Northern Ireland
7. Patient author, member of the CAC Community Advisory Council of Solve ME/CFS Initiative, Pietro Barilla Children's Hospital, Department of Medicine & Surgery, University of Parma, Via Gramsci 14, Parma, 43126, Italy
8. Pietro Barilla Children's Hospital, Department of Medicine & Surgery, University of Parma, Via Gramsci 14, Parma, 43126, Italy
9. Department of pediatrics & pediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
10. MSc Immunology, Imperial College London, London, UK
11. ISARIC Global Support Centre, Centre for Tropical Medicine & Global Health, University of Oxford, Oxford, UK