Internal Medicine, cilt.52, sa.3, ss.339-344, 2013 (SCI Expanded İndekslerine Giren Dergi)
Objective The aim of the present study was to evaluate the plasma vitamin D (vit D) levels and their association with the disease activity in patients with ankylosing spondylitis (AS) and undifferentiated spondyloarthritis (uSpA) compared with healthy populations.