Upper Gastrointestinal Fiberoptic Endoscopic Experience in Turkey - ATEŞ, K. Bahri; DALAY, A. Remzi; BOYACIOĞLU, Sedat; CANER, M. Emin; DOLAR, M. Enver; HİLMİOĞLU, Fatih; ŞAHİN, Burhan (Turkish Journal of Gastroenterology, 1992)