[1] Ohio State Univ, Dept Neurol, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Biostat, Columbus, OH 43210 USA
[3] Calif Pacific Med Ctr Res Inst, Forbes Norris ALS Ctr, San Francisco, CA USA
[4] Univ Miami, Dept Neurol, Miller Sch Med, Miami, FL USA
[5] Univ Kansas, Med Ctr, Dept Neurol, Kansas City, KS 66103 USA
[6] Biol Consulting Grp, Rockville, MD USA
[7] Harvard Univ, Nashoba Valley Healthcare Grp, Cambridge, MA 02138 USA
[8] Univ Texas SW Med Ctr Dallas, Dept Neurol, Dallas, TX 75390 USA
[9] Childrens Natl Med Ctr, Dept Neurol, Ctr Genet Med, Washington, DC 20010 USA
[10] Nationwide Childrens Res Inst, Columbus, OH USA
[11] Nationwide Childrens Hosp, Columbus, OH USA
[12] Shriners Hosp Children, Portland, OR 97201 USA
[13] Hennepin Cty Med Ctr, Dept Pathol, Minneapolis, MN 55415 USA