1. Department of Internal Medicine 2, Caritas Krankenhaus, Bad Mergentheim, Germany
2. Ultrasound Department, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
3. Internal Medicine and Critical Subacute Care Unit, Medicine Geriatric-Rehabilitation Department, University-Hospital of Parma, Parma, Italy
4. Department of Radiology, University of Medicine and Pharmacy “Iuliu Hatieganu”, Cluj-Napoca, Romania
5. Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai, China