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Yeap, S.S. and Othman, A.Z. and Zain, A.A. and Chan, S.P. (2012) Vitamin D levels: its relationship to bone mineral density response and disease activity in premenopausal Malaysian systemic lupus erythematosus patients on corticosteroids. International Journal of Rheumatic Diseases, 15 (1). pp. 17-24. ISSN 1756-1841, DOI PMID: 22324943 .