POSTED 30 APRIL 2009
Credits
Gary Huffnagle
Professor of internal medicine and microbiology, University of Michigan Health System.
David Pyne
Department of Physiology, Australian Institute of Sport.
Mary Ellen Sanders
Executive director, International Scientific Association for Probiotics and Prebiotics.
* Vincent Young
Associate professor, infectious disease specialist, University of Michigan.
*indicates fact-checker
Terry Devitt, editor; Nathan Hebert, project assistant; S.V. Medaris, designer/illustrator; David Tenenbaum, feature writer; Amy Toburen, content development executive