Salaffi F, Stancati A, Procaccini R, Cioni F, Grassi W. Assessment of circadian rhythm in pain and stiffness in rheumatic diseases according the EMA (Ecologic Momentary Assessment) method: patient compliance with an electronic diary. Reumatismo [Internet]. 2005 Dec. 30 [cited 2024 Apr. 16];57(4):238-49. Available from: https://www.reumatismo.org/reuma/article/view/reumatismo.2005.238