RT Journal Article SR Electronic T1 Prevalence of vitamin D deficiency and its associated factors among rheumatoid arthritis patients managed in a rheumatology unit of a tertiary care hospital in Sri Lanka JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 30 OP 30 DO 10.7861/clinmedicine.19-3-s30 VO 19 IS Suppl 3 A1 Sethuge Sanjeeva Chaminda Silva A1 Gunendrika Kathurirathne A1 Buddhika Mahesh A1 Janalini Sashikaran A1 Kumari Jayasiri YR 2019 UL http://www.rcpjournals.org/content/19/Suppl_3/30.abstract