An Assessment of the Potential Value of Endoscopic Ultrasound as a Cost-Minimizing Tool in Dyspeptic Patients with Persistent Symptoms - Sahai, A. V.; Penman, I. D.; Mishra, G.; Williams, D.; Pearson, A.; Wallace, M. B.; van Velse, A.; Hoffman, B. J.; Hawes, R. H. (Endoscopy, 2001)