title: A macromolecular tracer indicates that the spinal epidural space connects directly to the venous circulation in pigs.
authors.affiliation: Department of Anesthesiology, University of Pittsburgh, Pittsburgh, PA, USA. Buffingtoncw@anes.upmc.edu
authors.forename: Charles W
authors.initials: CW
authors.lastname: Buffington
authors.forename: Elisabet U M
authors.initials: EU
authors.lastname: Blix