AUTHOR=Martínez-Carranza Enrique , Barajas Hugo , Alcaraz Luis-David , Servín-González Luis , Ponce-Soto Gabriel-Yaxal , Soberón-Chávez Gloria TITLE=Corrigendum: Variability of Bacterial Essential Genes Among Closely Related Bacteria: The Case of Escherichia coli JOURNAL=Frontiers in Microbiology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2018.02330 DOI=10.3389/fmicb.2018.02330 ISSN=1664-302X