Khan, N.A. Yazici, Y. Calvo-Alen, J. Dadoniene, J. Gossec, L. Hansen, T.M. Huisman, M. Kallikorm, R. Muller, R. Liveborn, M. Oding, R. Luchikhina, E. Naranjo, A. Rexhepi, S. Taylor, P. Tlustochowich, W. Tsirogianni, A. Sokka, T., Reevaluation of the role of duration of morning stiffness in the assessment of rheumatoid arthritis activity, Indian Journal of Rheumatology, (36), 2435-2442, 2009,