Sormaz Cem İ, Uymaz S. D, İşcan Y. A, Özgür  İ, Salmaslıoğlu  A, Tunca  F, Şenyürek G. Y, Terzioğlu  T. The Value of Preoperative Volumetric Analysis by Computerised Tomography of Retrosternal Goiter to Predict the Need for an Extra-Cervical Approach. Balkan Med J 2018;35:36-42