title: Endoscopic diagnosis and treatment of upper gastrointestinal tumors.
authors.affiliation: Department of Gastroenterology and Hepatology, Medical Center for Postgraduate Education, Warsaw, Poland. mp.polkowski@gmail.com
authors.forename: M
authors.initials: M
authors.lastname: Polkowski
mesh_terms: D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis* / Q000628:therapy*; D006801:Humans