PT - JOURNAL ARTICLE AU - Wagner, Kathryn R. TI - The need for biomarkers in amyotrophic lateral sclerosis drug development AID - 10.1212/01.wnl.0000338538.18938.9d DP - 2009 Jan 06 TA - Neurology PG - 11--12 VI - 72 IP - 1 4099 - http://n.neurology.org/content/72/1/11.short 4100 - http://n.neurology.org/content/72/1/11.full SO - Neurology2009 Jan 06; 72