Whitehead William E, Bharucha Adil E
Center for Functional Gastrointestinal and Motility Disorders, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Gastroenterology. 2010 Apr;138(4):1231-5, 1235.e1-4. doi: 10.1053/j.gastro.2010.02.036. Epub 2010 Feb 19.