The classic. Stiffening of the spine in flexion, a special form of disease. Professor V.M. Bechterew.
D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009462:Neurology / Q000266:history; D012425:Russia (Pre-1917); D013167:Spondylitis, Ankylosing / Q000266:history*