Sex ratios and age at onset in probands and secondary cases in the spondyloarthropathies.
James
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D017668:Age of Onset; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000453:epidemiology* / Q000235:genetics; D008297:Male; D012744:Sex Ratio; D013122:Spinal Diseases / Q000453:epidemiology* / Q000235:genetics