Hamit Yasar Ellidag1, Esin Eren2, Ozgur Aydin3, Necat Yilmaz4. 1. Central Laboratories of Antalya Education and Research Hospital of Ministry of Health, Antalya, Turkey ; Clinical Biochemistry Central Laboratory Ministry of Health, Antalya Egitim ve Arastirma, Antalya Education and Research Hospital, Hastanesi Varlik Mahallesi Kazim Karabekir Caddesi Soguksu, 07100 Antalya, Turkey. 2. Department of Biochemistry, Atatürk Hospital, Antalya, Turkey. 3. Maternaty and Children's Hospital, Batman, Turkey. 4. Central Laboratories of Antalya Education and Research Hospital of Ministry of Health, Antalya, Turkey.