AUTHOR=Putignani Lorenza TITLE=Human gut microbiota: onset and shaping through life stages and perturbations JOURNAL=Frontiers in Cellular and Infection Microbiology VOLUME=2 YEAR=2012 URL=https://www.frontiersin.org/journals/cellular-and-infection-microbiology/articles/10.3389/fcimb.2012.00144 DOI=10.3389/fcimb.2012.00144 ISSN=2235-2988