Mortality among patients with ankylosing spondylitis after a single treatment course with x rays.Peter G. Smith(University of London), Richard Doll(University of Oxford)BMJFebruary 13, 198210.1136/bmj.284.6314.449Cited by 231SaveCiteExport RISWatch citationsRelated PapersRadon in homes and risk of lung cancer: collaborative analysis of individual data from 13 European case-control studies|BMJ|2004|1.8kMortality in relation to smoking: 22 years' observations on female British doctors.|BMJ|1980|353