Topal G, Dönmez A, Uydes Doğan B S, Kucur M, Taspinar Cengiz D, Berkoz F B, Erdoğan N: Asymmetric dimethylarginine (ADMA) levels are increased in patients with fibromyalgia: Correlation with tumor necrosis faktor- ? (TNF- ? ) and 8-iso-prostaglandin F2? (8-iso – PGF2?). ,