Classification Criteria for Axial Disease in Youth With Juvenile Spondyloarthritis. - Weiss PF; Brandon TG; Aggarwal A; Burgos-Vargas R; Colbert RA; Horneff G; Laxer RM; Minden K; Ravelli A; Ruperto N; Smith JA; Stoll ML; et al. (Arthritis & rheumatology (Hoboken, N.J.), 2024)