[The diagnosis of very early Bechterew's disease (roentgen diagnostic studies on the sacroiliac joint II)].
D000844:Ankylosis; D003955:Diagnostic Tests, Routine; D006801:Humans; D012446:Sacroiliac Joint; D013166:Spondylitis; D013167:Spondylitis, Ankylosing
SACROILIAC JOINT; SPONDYLITIS, ANKYLOSING