title: New diagnostic approach to diagnosis of achalasia after recent Chicago classification.
authors.affiliation: Department of Gastroenterology, Gulhane School of Medicine (Yusuf Serdar Sakin, Ahmet Uygun, Sait Bagci), Ankara, Turkey.
authors.forename: Yusuf Serdar
authors.initials: YS
authors.lastname: Sakin
authors.affiliation: Department of Gastroenterology, Ankara Training and Research Hospital (Murat Kekilli), Ankara, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Kekilli
authors.affiliation: Department of Gastroenterology, Gulhane School of Medicine (Yusuf Serdar Sakin, Ahmet Uygun, Sait Bagci), Ankara, Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Uygun
authors.affiliation: Department of Gastroenterology, Gulhane School of Medicine (Yusuf Serdar Sakin, Ahmet Uygun, Sait Bagci), Ankara, Turkey.
authors.forename: Sait
authors.initials: S
authors.lastname: Bagci