title: Optimal Interval for Ultrasound Surveillance in Monochorionic Twin Gestations.
authors.affiliation: Magee-Womens Hospital, Department of Obstetrics and Gynecology, Pittsburgh, Pennsylvania.
authors.forename: Heidi L
authors.initials: HL
authors.lastname: Thorson
authors.forename: Devon M
authors.initials: DM
authors.lastname: Ramaeker
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Emery