A. M. Ajeed, N. K. Al-Adhami, and M. H. Munshed, “Effect of fibromyalgia syndrome (FMS) on disease activity (DAS28) score in patients with rheumatoid athritis(RA)”, J Fac Med Baghdad, vol. 53, no. 4, pp. 452–455, Jan. 2012, doi: 10.32007/jfacmedbagdad.534818.