GE - Portuguese Journal of Gastroenterology, volume 28, number 1
GE - Portuguese Journal of Gastroenterology, volume 28, number 1
GE - Portuguese Journal of Gastroenterology, volume 27, number 6
GE - Portuguese Journal of Gastroenterology, volume 27, number 4
GE - Portuguese Journal of Gastroenterology, volume 27, number 5
GE - Portuguese Journal of Gastroenterology, volume 27, number 3