title: Reply.
authors.affiliation: University of North Carolina, Chapel Hill, NC.
authors.forename: William
authors.initials: W
authors.lastname: Marston
authors.affiliation: Jobst Vascular Institute, Toledo, Ohio.
authors.forename: Fedor
authors.initials: F
authors.lastname: Lurie
authors.affiliation: State University of New York at Buffalo, Buffalo, NY.
authors.forename: Michael
authors.initials: M
authors.lastname: Vasquez
authors.affiliation: University of Michigan Medical Center, Ann Arbor, Mich.
authors.forename: Thomas
authors.initials: T
authors.lastname: Wakefield
authors.affiliation: Duke University Medical Center, Durham, NC.
authors.forename: Cynthia
authors.initials: C
authors.lastname: Shortell
authors.affiliation: University of Bonn, Bonn, Germany.
authors.forename: Eberhard
authors.initials: E
authors.lastname: Rabe