1. University College London Great Ormond Street Institute of Child Health; London UK
2. Hospital de Santa Maria; Centro Hospitalar Lisboa Norte; Lisbon Academic Medical Centre and Instituto Português de Reumatologia; Lisbon Portugal
3. University College London Great Ormond Street Institute of Child Health; Great Ormond Street Hospital for Children; NIHR Biomedical Research Centre at Great Ormond Street Hospital for Children; NHS Foundation Trust; and Arthritis Research UK Centre for Adolescent Rheumatology at University College London; University College London Hospital; and Great Ormond Street Hospital; London UK
4. Hospital for Sick Children; Toronto Ontario Canada
5. Great Ormond Street Hospital for Children; London UK