RT Journal Article SR Electronic T1 Girth and the Gut (Bacteria) JF Science JO Science FD American Association for the Advancement of Science SP 32 OP 33 DO 10.1126/science.332.6025.32 VO 332 IS 6025 A1 Pennisi, Elizabeth YR 2011 UL http://science.sciencemag.org/content/332/6025/32.abstract AB