1 Department of Medical Ultrasonics, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, Guangzhou, Guangdong 510630, China.
2 Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangdong Province Key Laboratory of Hepatology Research, Multiple Disciplinary Team Center of Thyroid Diseases, Guangzhou, Guangdong 510630, China.