CHCHD10 and amyotrophic lateral sclerosis: CHCHD10‐related diseases include mtDNA instability disorder, frontotemporal dementia‐amyotrophic lateral sclerosis (FTD‐ALS) clinical spectrum, late‐onset spinal motor neuropathy (SMAJ) and Charcot–Marie–Tooth disease type 2 (CMT2).91