Diagnostic yield of EUS-FNA in the diagnosis of subepithelial lesions of the gastrointestinal tract - De Angelis, C; Brizzi, F; Goss, M; Allegranza, P; Bruno, M; Carucci, P; Maldi, E; Pacchioni, D; Accinelli, G; Cassoni, P; Francia di Celle, P; Reggio, D; Rizzetto, M (Endoscopy, 2011)