Risk Stratification of Thyroid Nodules With Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance (AUS/FLUS) Cytology Using Ultrasonography Patterns Defined by the 2015 ATA Guidelines - Lee, J H; Han, K; Kim, E K; Moon, H J; Yoon, J H; Park, V Y; Kwak, J Y (Ann Otol Rhinol Laryngol, 2017)