Esophageal tumor diagnosed by capsule endoscopy - Sánchez-Yagüe, A; Caunedo-Álvarez, A; Romero-Castro, R; Romero-Vázquez, J; Antúnez-Infante, A; Pellicer-Bautista, F; Herrerías-Gutiérrez, J M (Endoscopy, 2006)