The role of hemospray in the endoscopic treatment of non variceal upper gastrointestinal bleeding; initial experiences in a tertiary centre gastroenterological unit - Kiss, Z; Szalai, M; Kárász, T; Szabó, A; Csöndes, M; Dancs, N; Kovács, V; Durcsán, H; Rácz, I (Zeitschrift für Gastroenterologie, 2015)