Singh, Sukhjinder, Ratan Lihite, Chitralekha Baruah, Mangala Lahkar, and Prashant Singh. 2016. “A Pilot Study of Comorbidities in Patients With Rheumatoid Arthritis at a Tertiary Care Hospital in Northeast India”. Biomedical Research and Therapy 3 (01), 454-59. http://bmrat.biomedpress.org/index.php/BMRAT/article/view/75.