1. Physical and Rehabilitation Medicine Unit, Luigi Sacco University Hospital, ASST Fatebenefratelli-Sacco, 20157 Milan, Italy
2. Department of Rehabilitation Medicine, First Faculty of Medicine and General University Hospital, Charles University, 12800 Prague, Czech Republic
3. Unit of Ultrasound in Internal Medicine, Department of Medicine and Science of Aging, University “G. d’Annunzio”, 66100 Chieti, Italy
4. UZR, Ultraschallzentrum und Institut für Rheumatologie, 4051 Basel, Switzerland
5. Rheumatology Clinic, University Hospital of Basel, 4001 Basel, Switzerland
6. Department of Translational Biomedicine and Neuroscience (DiBraiN), Aldo Moro University, 70121 Bari, Italy
7. Department of Biological and Environmental Science and Technologies (Di.S.Te.B.A.), University of Salento, 73100 Lecce, Italy
8. Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy
9. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei 10845, Taiwan
10. Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, 06100 Ankara, Turkey