The incidence of leukaemia in ankylosing spondylitis treated with x-rays.
D006801:Humans; D015994:Incidence; D007938:Leukemia / Q000706:statistics & numerical data*; D011878:Radiotherapy; D013166:Spondylitis; D013167:Spondylitis, Ankylosing / Q000628:therapy*; D014965:X-Rays
LEUKEMIA/statistics; RADIOTHERAPY; SPONDYLITIS, ANKYLOSING/therapy