Corrigendum: Afatinib for Advanced Non-small Cell Lung Cancer in a Case With an Uncommon Epidermal Growth Factor Receptor Mutation (G719A) Identified in the Cerebrospinal Fluid - Ma, Chunhua; Huang, Chuoji; Tang, Dongjiang; Ye, Xin; Li, Zhi; Liu, Renzhong; Mu, Ning; Li, Jing; Jiang, Rong; Zhang, Juncheng (Frontiers in Oncology, 2019)