title: Comparison of three premedication techniques on passage of an endoscope through the pyloric sphincter in dogs.
authors.affiliation: University of Minnesota, St. Paul, MN, USA.
authors.forename: L F
authors.initials: LF
authors.lastname: Graham
authors.affiliation: University of Minnesota, St. Paul, MN, USA.
authors.forename: L K
authors.initials: LK
authors.lastname: Merkel
authors.affiliation: University of Minnesota, St. Paul, MN, USA.
authors.forename: P K
authors.initials: PK
authors.lastname: Hendrix