1. Department of Endocrinology, Weihai Hospital of Traditional Chinese Medicine, Weihai, Shandong, China (mainland)
2. Department of Pathology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong, China (mainland)
3. Department of Ultrasound, Yantai Yuhuangding Hospital Affiliated to Qingdao University, Yantai, Shandong, China (mainland)