Physical activity and the association with sporadic ALS

@article{Veldink2005PhysicalAA,
  title={Physical activity and the association with sporadic ALS},
  author={Jan Herman Veldink and Sandra Kalmijn and G. J. Groeneveld and Maarten J. Titulaer and John H. J. Wokke and Leonard H. van den Berg},
  journal={Neurology},
  year={2005},
  volume={64},
  pages={241 - 245}
}
Objective: To assess whether lifetime physical activity during work and leisure time is associated with an increased risk of developing ALS and to determine the association between physical activity and duration or age at onset of disease. Methods: Patients referred to our clinic during the 1-year period 2001 to 2002 who had definite, probable, or possible ALS according to El Escorial criteria, without a familial history of ALS, were asked to participate in the study. A case-control study was… 
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