PMP22 and hereditary peripheral neuropathy: In individuals with demyelinating hereditary peripheral neuropathy lacking the PMP22 duplication, CMT4C stands out as the prevailing autosomal recessive subtype in certain countries, constituting over 20% in Italy (Piscosquito et al., 2016) and the Czech Republic (Laššuthová et al., 2011), 26% in Greece (Kontogeorgiou et al., 2019).