Juan J. Vila 1, Enrique Vazquez-Sequeiros 2, 3, Antonio Perez Millan 4, Ferrán González-Huix 5, Julio Iglesias-Garcia 6, Carlos De La Serna 9, Jose R. Aparicio 7, Jose Carlos Subtil 8, Alberto Alvarez 11, Felipe De La Morena 10, Jesús García-Cano 12, Ma Angeles Casi 13, Angel Lancho 17, Angel Barturen 14, Santiago-Jose Rodríguez-Gómez 15, Alejandro Repiso 16, Diego Juzgado 3, Francisco Igea 4, Ignacio Fernandez-Urien 1, Juan Angel González-Martin 2, Manuel Perez-Miranda 9
1 Endoscopy Unit, Hospital de Navarra, Pamplona, Spain
2 Endoscopy Unit., Hospital Ramón y Cajal, Madrid, Spain
3 Endoscopy Unit, Hospital Quirón., Madrid, Spain
4 Endoscopy Unit., Hospital Río Carrión., Palencia, Spain
5 Endoscopy Unit, Hospital Josep Trueta, Girona, Spain
6 Endoscopy Unit, Hospital Clinico Universitario, Santiago de Compostela, Spain
7 Endoscopy Unit, Hospital General Universitario, Alicante, Spain
8 Endoscopy Unit, Clínica Universidad de Navarra, Pamplona, Spain
9 Endoscopy Unit, Hospital Infanta Cristina, Madrid, Spain
10 Endoscopy Unit, Hospital Infanta Cristina, Madrid, Spain
11 Endoscopy Unit, Hospital Universitario, Salamanca, Spain
12 Endoscopy Unit., Hospital Virgen de la Luz, Cuenca, Spain
13 Endoscopy Unit, Hospital Virgen del Camino, Pamplona, Spain
14 Endoscopy Unit, Hospital de Cruces, Bilbao, Spain
15 Endoscopy Unit, Hospital Virgen de la Concha, Zamora, Spain
16 Endoscopy Unit, Hospital Virgen de la Salud, Toledo, Spain
17 Endoscopy Unit, Hospital Xeral, Lugo, Spain