Funding for this research was provided by:
National Institutes of Health (R21 NS099631, R35 NS097261, R35 NS097273, P01 NS084974, P01 NS099114)
Amyotrophic Lateral Sclerosis Association (18-IIA-417)
Robert Packard Center for ALS Research, Johns Hopkins University (N/A)
Muscular Dystrophy Association (602854)
Mayo Clinic Foundation (N/A)
Received: 29 October 2019
Accepted: 14 January 2020
First Online: 30 January 2020
Ethics approval and consent to participate
: All subjects agreed to be in the study, and biological specimens were obtained after informed consent with approval from the Mayo Clinic Institutional Review Board (IRB).
: MDJ and RR hold a patent on methods to screen for the hexanucleotide repeat expansion in the <i>C9orf72</i> gene. No other competing interests were declared.