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. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei Hu Branch, Taipei 10845, Taiwan
4. Department of Public Health, Rehabilitation Unit, University Federico II of Naples, 80131 Naples, Italy
5. Department of Physical and Rehabilitation Medicine, Mersin University Medical School, 33000 Mersin, Turkey
6. Institute of Anatomy, First Faculty of Medicine, Charles University, 12800 Prague, Czech Republic
7. Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, 06100 Ankara, Turkey