1. Department of Thyroid Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, Henan, China
2. Department of Dermatology, The Affiliated Children’s Hospital of Zhengzhou University, Zhengzhou 450002, Henan, China
3. Department of Ultrasonagraphy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, Henan, China