Corrigendum: Conversion Discriminative Analysis on Mild Cognitive Impairment Using Multiple Cortical Features from MR Images - Shengwen Guo; Chunren Lai; Congling Wu; Guiyin Cen; The Alzheimer's Disease Neuroimaging Initiative; Michael W. Weiner; Paul Aisen; Michael Weiner; Paul Aisen; Ronald Petersen; Clifford R. Jack; William Jagust; et al. (Frontiers in Aging Neuroscience, 2017)