Dergiler / art / 2014 / Cilt: 29 - Sayı: 4Vitamin D levels in patients with ankylosing spondylitis and ıts relationship with disease activityNilgün ÜSTÜN,AYŞE DİCLE TURHANOĞLUDergiartSayı2014 · Cilt: 29 - Sayı: 4Sayfa321–322DOI—