Knowles C H, Aziz Q
Neurogastroenterology Group, Centres for Academic Surgery, Institute of Cellular and Molecular Science, Barts and the London, Queen Mary's School of Medicine and Dentistry, Whitechapel, London, UK.
Gut. 2008 May;57(5):674-83. doi: 10.1136/gut.2007.127886. Epub 2007 Dec 13.