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