PMP22 and Charcot-Marie-Tooth disease: The duplication of PMP22 is the most common cause of CMT, with a prevalence up to 40% in some populations (Reilly and Shy, 2009; Abe et al., 2011; Saporta et al., 2011; Murphy et al., 2012; Østern et al., 2013; Sivera et al., 2013).