Biopsy sampling in upper gastrointestinal endoscopy - a survey from ten tertiary referral centres across Europe Yazar: Bornschein, J, Tran-Nguyen, T, Fernandez-Esparrach, G, Ash, S, Balaguer, F, Bird-Lieberman, E, Córdova, H, Dzerve, Z, Fassan, M, Leja, M, Lyutakov, I, Middelburg, T, Moreira, L, Nakov, R, Nieuwenburg, SAV, O'Connor, A, Realdon, S, DeSchepper, H, Smet, A, Spaander, MCW, Tolmanis, I, Urbonas, T, Weigt, J, Hold, GL, Link, A, Kupcinskas, J