PMP22 and Charcot-Marie-Tooth disease type 1A: Depending on the diversity of genetic mutations that cause the disease, CMT can be further divided into various subtypes; e.g., CMT1A, B, C, or D are associated with Pmp22 [25], myelin protein zero (Mpz) [26], lipopolysaccharide-induced tumor-necrosis-factor-alpha factor (Litaf) [27], and early growth response 2 (Egr2) [28], respectively.