1. Department of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Changchun, China
2. Department of Obstetrics and Gynecology, China-Japan Union Hospital of Jilin University, Changchun, China
3. Department of Pediatrics, The First Hospital of Jilin University, Changchun, China
4. Department of Ultrasonography, China-Japan Union Hospital of Jilin University, Changchun, China
5. Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, China