SOX10 and neuropathy: Co‐staining NMJs with the Schwann cell nuclear marker SOX10 was performed to see if the age‐related NMJ neuropathy in HET3 mice could be attributed to a loss of terminal Schwann cells (tSCs, or specialized support cells located at the NMJ terminus) as had been proposed previously (Fuertes‐Alvarez & Izeta, 2021).