Letter to the editor on a paper by Kaivola et al. (2020): carriership of two copies of C9orf72 hexanucleotide repeat intermediate-length alleles is not associated with amyotrophic lateral sclerosis or frontotemporal dementia

Affiliations

• ¹ Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, The Netherlands. scm.deboer@amsterdamumc.nl.
• ² Amsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands. scm.deboer@amsterdamumc.nl.
• ³ MRC Prion Unit at UCL, Institute of Prion Diseases, UCL, London, UK.
• ⁴ Department of Neurology and Alzheimer Center Erasmus MC, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
• ⁵ Foundation IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.
• ⁶ Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, The Netherlands.
• ⁷ Amsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands.
• ⁸ Center for Neurobehavioral Genetics, University of California, Los Angeles, CA, USA.
• ⁹ Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
• ¹⁰ Department of Neurology, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands.
• ¹¹ Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.
• ¹² Department of Human Genetics, Amsterdam Reproduction and Development Research Institute, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
• ¹³ Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada.
• ¹⁴ Genomics of Neurodegenerative Diseases and Aging, Human Genetics, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, Amsterdam, The Netherlands.