Corrigendum: In Vivo Isotopic Labeling of Symbiotic Bacteria Involved in Cellulose Degradation and Nitrogen Recycling within the Gut of the Forest Cockchafer (Melolontha hippocastani) - Alonso-Pernas, Pol; Bartram, Stefan; Arias-Cordero, Erika M.; Novoselov, Alexey L.; Halty-deLeon, Lorena; Shao, Yongqi; Boland, Wilhelm (Frontiers in Microbiology, 2018)