Hasanoglu, Adnan, Tamer Baysal, Ertan Bulbuloglu, and Zeki Yildirim. “Upper Airway Obstruction With a Large Calcified Substernal Benign Goiter”. Annals of Medical Research 3, no. 3 (May 25, 2021): 0203–0205. Accessed July 22, 2024. http://annalsmedres.org/index.php/aomr/article/view/2519.