[1] Childrens Hosp Westmead, Ctr Kidney Res, Westmead, NSW, Australia
[2] Childrens Hosp Westmead, Dept Rheumatol, Westmead, NSW, Australia
[3] Univ Sydney, Sydney Sch Publ Hlth, Sydney, NSW 2006, Australia
[4] Univ Sydney, Discipline Paediat & Child Hlth, Sydney, NSW 2006, Australia
[5] Univ New S Wales, Sch Maternal & Child Hlth, Sydney, NSW 2052, Australia
[6] Liverpool Hosp, Dept Rheumatol, Sydney, NSW, Australia
[7] Canberra Hosp, Dept Rheumatol, Canberra, ACT, Australia
[8] Univ Western Sydney, Sch Med, Campbelltown, NSW, Australia
[9] Univ New S Wales, South West Sydney Clin Sch, Liverpool, Merseyside, England