Ankylosing spondylitis, birth order, and hormones: comment on the article by Baudoin et al.
James
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D001722:Birth Order; D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood*; D006801:Humans; D008297:Male; D013167:Spondylitis, Ankylosing / Q000097:blood / Q000453:epidemiology / Q000209:etiology
D012739:Gonadal Steroid Hormones