Corrigendum: Microstructural Abnormalities Were Found in Brain Gray Matter from Patients with Chronic Myofascial Pain - Peng Xie; Bangyong Qin; Ganjun Song; Yi Zhang; Yi Zhang; Song Cao; Song Cao; Jin Yu; Jianjiang Wu; Jiang Wang; Tijiang Zhang; Xiaoming Zhang; et al. (Frontiers Media S.A., 2017)