AUTHOR=Smythies Lesley E. , Smythies John R. TITLE=Microbiota, the immune system, black moods and the brain—melancholia updated JOURNAL=Frontiers in Human Neuroscience VOLUME=8 YEAR=2014 URL=https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2014.00720 DOI=10.3389/fnhum.2014.00720 ISSN=1662-5161