1 Hacettepe University Medical School, Department of Physical and Rehabilitation Medicine, Ankara, Turkey. lozcakar@yahoo.com.
2 Physical and Rehabilitation Medicine Unit, Luigi Sacco University Hospital, ASST Fatebenefratelli-Sacco, Milan, Italy.
3 Department of Physical Medicine and Rehabilitation and Community and Geriatric Research Center, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan.
4 Department of Rehabilitation Medicine, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic.
5 Hacettepe University Medical School, Department of Physical and Rehabilitation Medicine, Ankara, Turkey.