Corrigendum: Analgesic Effects of Compression at Trigger Points Are Associated With Reduction of Frontal Polar Cortical Activity as Well as Functional Connectivity Between the Frontal Polar Area and Insula in Patients With Chronic Low Back Pain: A Randomized Trial - Kodama, Kanae; Takamoto, Kouichi; Nishimaru, Hiroshi; Matsumoto, Jumpei; Takamura, Yusaku; Sakai, Shigekazu; Ono, Taketoshi; Nishijo, Hisao (Frontiers in Systems Neuroscience, 2020)