Increased risk of ankylosing spondylitis among first-born children: comment on the article by Baudoin et al.
Said-Nahal
R
R
Miceli-Richard
C
C
Dougados
M
M
Breban
M
M
D000328:Adult; D001722:Birth Order; D002648:Child; D005192:Family Health; D005260:Female; D006801:Humans; D008297:Male; D012307:Risk Factors; D013167:Spondylitis, Ankylosing / Q000209:etiology*