RT Journal Article SR Electronic T1 Variable reporting of C9orf72 and a high rate of uncertain results in ALS genetic testing JF Neurology Genetics JO Neurol Genet FD Lippincott Williams & Wilkins SP e301 DO 10.1212/NXG.0000000000000301 VO 5 IS 1 A1 Holly Klepek A1 Stephen A. Goutman A1 Adam Quick A1 Stephen J. Kolb A1 Jennifer Roggenbuck YR 2019 UL http://ng.neurology.org/content/5/1/e301.abstract AB