1. Department of Interventional Medicine, China-Japan Friendship Hospital, Beijing, China
2. Department of Ultrasound, the First Affiliated Hospital of Dalian Medical University, Dalian, China
3. Department of Medical Ultrasound, Yantai Affliated Hospital of Binzhou Medical University, Yantai, China
4. Department of Electrodiagnosis, the Affiliated Hospital to Changchun University of Traditional Chinese Medicine, Changchun, China
5. Department of Ultrasound, the First Affiliated Hospital of Baotou Medical College of Inner, Mongolia University of Science and Technology, Baotou, China
6. Department of Thyroid, Beijing Beicheng Chinese Medicine Hospital, Beijing, China
7. Department of Breast and Thyroid Surgery, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
8. Department of Ultrasound, Wuhai People's Hospital, Wuhai, China
9. Department of Interventional Ultrasound, Qinghai Provincial People's Hospital, Xining, China
10. Department of Ultrasound, Mudanjiang Tumor Hospital, Mudanjiang, China
11. Special Inspection Section, Wendeng District People's Hospital, Weihai, China
12. Department of Medical Ultrasound, Yantai Hospital of Shandong Wendeng Orthopaedics & Traumatology, Yantai, China