Whitehead William E
Center for Functional Gastrointestinal and Motility Disorders, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7080, USA.
Nat Clin Pract Gastroenterol Hepatol. 2008 Feb;5(2):74-5. doi: 10.1038/ncpgasthep1032. Epub 2007 Dec 18.