[1] Hacettepe Univ, Fac Med, Dept Pediat, Div Rheumatol, Ankara, Turkiye
[2] Istanbul Univ, Istanbul Sch Med, Dept Pediat Rheumatol, Istanbul, Turkiye
[3] Univ Hlth Sci, Ankara Res & Training Hosp, Dept Pediat, Div Rheumatol, Ankara, Turkiye
[4] Univ Hosp Ctr Zagreb, Dept Pediat, Zagreb, Croatia
[5] Univ Zagreb, Sch Med, Dept Pediat, Zagreb, Croatia
[6] Lagos State Univ Teaching Hosp, Dept Paediat, Paediat Rheumatol Unit, Lagos, Nigeria
[7] AOU Meyer IRCCS, Pediat Rheumatol Unit, Florence, Italy
[8] Meir Med Ctr, Dept Pediat, Pediat Rheumatol Unit, Kefar Sava, Israel
[9] Duke Univ, Sch Med, Dept Pediat, Div Pediat Rheumatol, Durham, NC USA
[10] Univ Penn, Childrens Hosp Philadelphia, Philadelphia, PA USA
[11] Univ Penn, Philadelphia, PA USA
[12] UMC Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Immunol & Rheumatol, Utrecht, Netherlands
[13] Tel Aviv Univ, Sch Med, Tel Aviv, Israel
[14] Meir Med Ctr, Dept Pediat, Pediat Rheumatol Unit, Tel Aviv, Israel
[15] Hacettepe Univ, Dept Pediat, Fac Med, Div Rheumatol, Ankara, Turkiye
[16] Hacettepe Univ, Ihsan Dogramaci Cocuk Hastanesi, Cocuk Romatoloji Bolumu, Kat 3, TR-06100 Ankara, Turkiye