TI - Increased gamma-glutamyl transferase level is associated with absence of coronary collateral vessels in patients with acute coronary syndrome: an observational study AU - Duran, M. AU - Günebakmaz, Ö. AU - Kadir Uysal, O. AU - Çelik, A. AU - Yarlioglues, M. AU - Karakaya, E. SO - The Anatolian Journal of Cardiology 2012;12:652-658. DO - 10.5152/akd.2012.217