Arif GÜLKESEN et al. 2016. Relationship Between Leptin and Neopterin Levels and Disease Activation Parameters in Patients With Rheumatoid Arthritis. Archives of Rheumatology. 31, 4 (Dec. 2016), 333–339. DOI:https://doi.org/10.5606/ArchRheumatol.2016.5893.