THE SURGICAL TREATMENT OF OESOPHAGEAL ACHALSIA : ARE ANTIREFLUX PROCEDURES NECESSARY? - AKINCIOĞLU, Tevfik; ATALAY, Fuat; GÜNDOĞDU, Haldun; KIRIMLIOĞLU, Vedat; ONARAN, Mustafa Şerif (Turkish Journal of Gastroenterology, 1992)