1. Department of Rheumatology; Children's Health Queensland; South Brisbane Australia
2. School of Public Health and Preventive Medicine; Monash University; Melbourne Australia
3. Rheumatology Unit, Department of General Medicine; The Royal Children's Hospital; Melbourne Australia
4. Department of Paediatric Rheumatology; Monash Children's Hospital; Melbourne Australia
5. Department of Rheumatology; The Queen Elizabeth Hospital and University of Adelaide; Woodville Australia
6. Child Development and Exercise Center; Wilhelmina Children's Hospital, University Medical Center Utrecht; Utrecht Netherlands