TI - The relationship between gamma-glutamyltransferase and coronary collateral circulation in patients with chronic total occlusion AU - Şahin, M. AU - Demir, S. AU - Emin Kalkan, M. AU - Özkan, B. AU - Alıcı, G. AU - Cantürk Çakalağaoğlu, K. AU - Vefik Yazıcıoğlu, M. AU - Sarıkaya, S. AU - Biteker, M. AU - Muhsin Türkmen, M. SO - The Anatolian Journal of Cardiology 2014;14:48-54. DO - 10.5152/akd.2013.236