Rolanda Carla, Gonçalves Raquel, Macedo Guilherme
Department of Gastroenterology, S. Marcos Hospital and Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal.
Gastroenterology. 2009 Jul;137(1):41, 395. doi: 10.1053/j.gastro.2008.12.068. Epub 2009 Jun 2.