A nationwide German survey on EUS-guided diagnosis and management of suspected Gastrointestinal Stromal Tumors (GIST) – The gap between evidence and “Gut Feeling” - Eckardt, AJ; Barreiros, AP; Will, U; Burmester, E; Jenssen, C (Ultraschall in der Medizin - European Journal of Ultrasound, 2013)