Lifetime physical activity and the risk of amyotrophic lateral sclerosis
Mark H B Huisman, Meinie Seelen, Sonja W de Jong, Kirsten R I S Dorresteijn, Perry T C van Doormaal, Anneke J van der Kooi, Marianne de Visser, Helenius Jurgen Schelhaas, Leonard H van den Berg, Jan Herman Veldink
Journal of Neurology, Neurosurgery & Psychiatry Sep 2013, 84 (9) 976-981; DOI: 10.1136/jnnp-2012-304724