Pain characteristics and sleep dysregulation in patients with rheumatoid arthritis and ankylosing spondylitis: relationships with pain intensity and disease activity. - Burlui, Maria-Alexandra; Stincescu, Danuta; Codrianu, Angela; Cardoneanu, Anca; Mihai, Ioana Ruxandra; Rezus, Elena (Romanian Journal of Rheumatology / Revista Romana de Reumatologie, 2023)