Poonotoke, Pratirop. 2019. “Unsatisfactory Ultrasound-Guided Fine Needle Aspiration of Thyroid Nodule: Which Factors Limit Cytology Result?”. The ASEAN Journal of Radiology 19 (2). Bangkok, Thailand:100-107. https://www.asean-journal-radiology.org/index.php/ajr/article/view/27.