Article
Multiple sclerosis and birth order: a longitudinal cohort study.
The Lancet. Neurology - 1 Oct 2005
Sadovnick A Dessa, Yee Irene M L, Ebers George C
Abstract excerpt
BACKGROUND: Genetic epidemiological studies suggest both genetic and environmental factors have a role in multiple sclerosis (MS). Environmental effects are strongly suggested from geographical gradients, migration data, and discordance rates in twins. In epidemiological studies, risk of MS in offspring of small families and in those with an early birth-order position has been reported and interpreted in the...
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