Myung Hi Yoo, MD. PhD graduated colledge of medicine, Seoul national university in 1984. She has been served as professor in the department of medicine, Soon-chun-hyang University Hospital since 1984, and as the director of Elim thyroid clinic since 2019.

She had worked as research fellow in the department of endocrinology and metabolism at Harvard medical school (Beth Israel Hospital, Boston, U.S.A) in 1989 and 1992.. She served as vlce President of Korean Endocrine Society 1n 2007

She has been devoted to the clinical practice and research about the differential diagnosis of thyroid nodules and has reported articles regarding that topic. Recently she focused her research regarding the efficacy of shear wave elastography in the differential diagnosis of thyroid disease and reported several articles. At present she is publishing a guide reference book for the differential diagnosis of thyroid nodules by shear wave elastography.

Hye Jeong Kim, Department of Internal Medicine, Soonchunhyang University Hospital, Seoul, Korea

In Ho Choi is currently an Associate Professor at the Department of Pathology at Soonchunhyang University Seoul Hospital. In the field of pathology, he is interested in thyroid pathology and pathology of hematolymphoid organs. In the field of education, he is a student manager of the college of medicine of Soonchunhyang Universityl. As an academic activity, he is active in the training education committee and information committee of the Korean Pathology Association. He win excellent thesis, the 69th Annual Fall Meeting of Korean Society of Pathologist. He served as a member of the Korea Social Security Information Service's professional committee in terms of standardization of health care and was awarded the Minister of Health and Welfare citation as a merit for standardizing health terminology based on ICT in 2019.

Sumi Yun, Department of Diagnostic Pathology, Samkwang Medical Laboratories, Seoul, Republic of Korea