title: Botulinum toxin injection in dysphagia syndromes with preserved esophageal peristalsis and incomplete lower esophageal sphincter relaxation.
authors.affiliation: Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: R F
authors.initials: RF
authors.lastname: Porter
authors.forename: C P
authors.initials: CP
authors.lastname: Gyawali