Comorbidities and related factors in rheumatoid arthritis patients of south India- Karnataka Rheumatoid Arthritis Comorbidity (KRAC) study oleh S. Chandrashekara, V. Shobha, B.G. Dharmanand, R. Jois, S. Kumar, K.M. Mahendranath, V. Haridas, S. Prasad, Y. Singh, M.A. Daware, A. Swamy, R. Subramanian, S.A. Somashekar, A.M. Shanthappa, K.R. Anupama