1. Department of Thyroid Surgery, The Second Affiliated Hospital of Zhejiang University College of Medicine, Hangzhou, China
2. Department of Thyroid and Breast Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
3. Department of Neonatology, Yidu Central Hospital of Weifang, Weifang, China
4. Shandong University School of Medicine, Jinan, China
5. Section of Endocrine Surgery, University of California, San Francisco, CA, USA