Increased risk of ankylosing spondylitis among first-born children: comment on the article by Baudoin et al.

@article{SaidNahal2001IncreasedRO,
  title={Increased risk of ankylosing spondylitis among first-born children: comment on the article by Baudoin et al.},
  author={Roula Said-Nahal and Corinne Miceli-Richard and Maxime R Dougados and Maxime Breban},
  journal={Arthritis and rheumatism},
  year={2001},
  volume={44 8},
  pages={1964-5}
}