Fikriye Figen Ayhan et al. 2024. Frequency of fibromyalgianess in patients with rheumatoid arthritis and ankylosing spondylitis: A multicenter study of Turkish League Against Rheumatism (TLAR) network. Archives of Rheumatology. 39, 1 (Mar. 2024), 020–032. DOI:https://doi.org/10.46497/ArchRheumatol.2023.9925.