AUTHOR=Walsh Fiona TITLE=The multiple roles of antibiotics and antibiotic resistance in nature JOURNAL=Frontiers in Microbiology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2013.00255 DOI=10.3389/fmicb.2013.00255 ISSN=1664-302X