Corrigendum: Altered Gut Microbiota and Compositional Changes in Firmicutes and Proteobacteria in Mexican Undernourished and Obese Children - Méndez-Salazar, Eder Orlando; Ortiz-López, María Guadalupe; Granados-Silvestre, María de los Ángeles; Palacios-González, Berenice; Menjivar, Marta (Frontiers in Microbiology, 2018)