1. MRC Clinical Trials Unit at UCLInstitute of Clinical Trials and MethodologyUniversity College London London UK
2. Paediatric Infectious Diseases DepartmentGreat Ormond Street Hospital London UK
3. Veltischev Research and Clinical Institute of PediatricsPirogov Russian National Research Medical University Moscow Russia
4. Federal State Autonomous Institution National Scientific and Practical Center of Children's Health of the Ministry of Health of the Russian Federation Moscow Russia
5. Centre of Children's GastroenterologyMorozovskaya Children's City Clinical Hospital Moscow Russia
6. Department of PediatricsInstitute of Postgraduate EducationKrasnoyarsk State Medical University of the Ministry of Health of the Russian Federation Krasnoyarsk Russia
7. Department of Congenital InfectionsPediatric Research and Clinical Center for Infectious Diseases Saint‐Petersburg Russia
8. Department of Pathological Anatomy of Pediatric FacultyPirogov Russian National Research Medical University Moscow Russia
9. Pediatric and Liver UnitMeyer Children's University Hospital of Florence Florence Italy
10. University College London Institute of Child HealthUniversity College London London UK