Denis Poddubnyy, Joachim Sieper, Servet Akar, Santiago Muñoz-Fernández, Hildrun Haibel, Maja Hojnik, Fabiana Ganz, Robert D Inman

Characteristics of Patients With Axial Spondyloarthritis by Geographic Regions: PROOF Multicountry
Observational Study Baseline Results
Rheumatology (2021)
Published online 13 December 2021, https://doi.org/10.1093/rheumatology/keab901