Gyawali, Merina, and Prakash Sharma. “Study of Role of Ultrasonography in Evaluation of Thyroid Nodules”. Nepalese Journal of Radiology 9, no. 1 (July 10, 2019): 2-6. Accessed April 6, 2020. https://www.nepjol.info/index.php/NJR/article/view/24780.