University of Niš, Niš, Serbia

Jelena Vojinović

Hamburg Centre for Pediatric Rheumatology, Hamburg, Germany

Ivan Foeldvari

Department of Pediatric Rheumatology, European Reference Network RITA, Ghent University Hospital, Ghent, Belgium

Joke Dehoorne

Children’s Hospital, Affiliate of Vilnius University Hospital Santaros Clinic, Vilnius, Lithuania

Violeta Panaviene

Clinic of Children’s Diseases, Vilnius University, Vilnius, Lithuania

Violeta Panaviene

University Children’s Hospital, Belgrade, Serbia

Gordana Susic

Asklepios Clinic Sankt Augustin, Sankt Augustin, and University Hospital of Cologne, Cologne, Germany

Gerd Horneff

Riga Stradins University, Children’s University Hospital, Riga, Latvia

Valda Stanevica

Provincial Children’s Hospital J. Brudzińskiego, Bydgoszcz, Poland

Katarzyna Kobusinska

Andrzej Frycz Modrzewski Krakow University, Krakow, Poland

Zbigniew Zuber

Szpital Specjalistyczny im. A. Falkiewicza, Szpital Specjalistyczny, Wroclaw, Poland

Bogna Dobrzyniecka

University Children’s Hospital, University Medical Centre, Ljubljana, Slovenia

Tadej Avcin

Pfizer, Buenos Aires, Argentina

Cecilia Borlenghi

Pfizer, Peapack, NJ, USA

Edmund Arthur

Pfizer, Collegeville, PA, USA

Chuanbo Zang & Bonnie Vlahos

Pfizer, Hellas (Cyprus Branch), Nicosia, Cyprus

Vassilis Tsekouras

Università degli Studi di Genova, Genoa, Italy

Alberto Martini

IRCCS Istituto Giannina Gaslini, UOC Gaslini Trial Centre/Servizio di Sperimentazioni Cliniche Pediatriche/PRINTO, Via Gaslini 5, 16147, Genoa, Italy

Nicolino Ruperto

The trial was designed jointly by PRINTO investigators (NR, AM) and the sponsor. Data were collected by the PRINTO investigators. The sponsor was involved in the overall management of the trial, data collection, and data analysis. All authors reviewed and approved the final document.