Is peptic ulcer surgery on the decline? - KARAHAN, Ömer; VATANSEV, Celalettin; BELVİRANLI, Metin and AKIN, Mustafa and AĞAOĞLU, Mehmet and ÖZTÜRK, Halil and GÖNEN, Sait and ER, Cemil and AK, Mehmet (Turkish Journal of Gastroenterology, 1995)