Sudden increase of neck flexion in ankylosing spondylitis: quo vadis?

Osman Hakan Gündüz
Marmara University Medical School, Department of Physical Medicine and Rehabilitation, Istanbul, Turkey

llker Yagc-
Marmara University Medical School, Department of Physical Medicine and Rehabilitation, Istanbul, Turkey

Mehmet Zeki K-ralp
Gülhane Military Medical Academy, Department of Physical Medicine and Rehabilitation, Istanbul, Turkey

Levent Özçakar
Gülhane Military Medical Academy, Department of Physical Medicine and Rehabilitation, Istanbul, Turkey