title: Erratum to: The prevalence and clinical characteristics of nonradiographic axial spondyloarthritis among patients with inflammatory back pain in rheumatology practices: a multinational, multicenter study.
authors.affiliation: Department of Rheumatology, General Hospital of Mexico, Mexico City, Mexico.
authors.forename: Ruben
authors.initials: R
authors.lastname: Burgos-Vargas
authors.affiliation: Division of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Road, Taichung City, 40201, South District, Taiwan. jccwei@gmail.com.|Institute of Medicine, Chung Shan Medical University, Taichung City, Taiwan. jccwei@gmail.com.|Graduate Institute of Integrated Medicine, China Medical University, Taichung City, Taiwan. jccwei@gmail.com.
authors.forename: James Cheng-Chung
authors.initials: JC
authors.lastname: Wei
authors.affiliation: University of Pennsylvania, Philadelphia, PA, USA.|Pfizer, Collegeville, PA, USA.
authors.forename: Mahboob U
authors.initials: MU
authors.lastname: Rahman
authors.affiliation: Dokuz Eylül University, İzmir, Turkey.
authors.forename: Nurullah
authors.initials: N
authors.lastname: Akkoc
authors.affiliation: Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh.
authors.forename: Syed Atiqul
authors.initials: SA
authors.lastname: Haq
authors.affiliation: Hamad Hospital, Doha, Qatar.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Hammoudeh
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Ehab
authors.initials: E
authors.lastname: Mahgoub
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Ena
authors.initials: E
authors.lastname: Singh
authors.affiliation: Pfizer Asia Pacific Region, Makati, Philippines.
authors.forename: Lyndon John
authors.initials: LJ
authors.lastname: Llamado
authors.affiliation: Pfizer Africa and Middle East Region, Dubai, United Arab Emirates.
authors.forename: Khalid
authors.initials: K
authors.lastname: Shirazy
authors.affiliation: Pfizer, New York, NY, USA.
authors.forename: Sameer
authors.initials: S
authors.lastname: Kotak
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Constance
authors.initials: C
authors.lastname: Hammond
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Ron
authors.initials: R
authors.lastname: Pedersen
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Qi
authors.initials: Q
authors.lastname: Shen
authors.affiliation: Pfizer, Collegeville, PA, USA.
authors.forename: Bonnie
authors.initials: B
authors.lastname: Vlahos