1. Department of Joint Surgery The Affiliated Hospital of Qingdao University Qingdao China
2. Center for Musculoskeletal Surgery, Charité University Medicine Berlin Berlin Germany
3. Ophthalmology Department, Affiliated Qingdao Central Hospital Qingdao University Qingdao China
4. Department of Electrocardiogram The Affiliated Hospital of Qingdao University Qingdao China