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;

Pediatric research in Spain: Challenges and opportunities Laura Moreno-Galarraga; Cesar Gracía Vera; Irene Rivero-Calle; Federico Martinón-Torres; Ignacio Diez López; Fernando Cabañas; Cristina Calvo;

A holistic perspective of the comorbidities in childhood obesity Rosa Herrera; Empar Lurbe;