PMP22 and hereditary neuropathy with liability to pressure palsies: The most common genetic diagnoses were CMT1A caused by PMP22 duplication, accounting for one half of all patients (48%); HNPP caused by PMP22 deletion (14%); CMT1X caused by pathogenic variants in GJB1 (13%); P0-related neuropathies caused by MPZ pathogenic variants (7%); CMT2A due to MFN2 pathogenic variants (5%).