Reporting guidelines and a touch of critical appraisal Pilar Aizpurua Galdeano; Paz González Rodríguez; María Aparicio Rodrigo; Nieves Balado Insunza; Elena Pérez González; Juan Ruiz-Canela Cáceres; Eduardo Ortega Páez;

Usefulness of complementary test in the study of patients with chronic abdominal pain María Isabel Jiménez Candel; Tatiana Salvador Pinto; Mónica García Peris; Elena Crehuá Gaudiza; Carmen Jovaní Casano; María Antonia Moreno Ruiz; Tomás Hernández Bertó; Esther Largo Blanco; Cecilia Martínez Costa;