Matthew C Kiernan, Steve Vucic, Benjamin C Cheah, Martin R Turner, Andrew Eisen, Orla Hardiman, James R Burrell, Margaret C Zoing, Amyotrophic lateral sclerosis Review Article, The Lancet, Volume 377, Issue 9769, 12 March 2011-18 March 2011, Pages 942-955 reproduced with permssion from Elsevier
