title: Authors' response.
authors.affiliation: Grand Rapids, MI.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Smiley
authors.affiliation: Department of Dentistry, Advocate Illinois Masonic Medical Center, Chicago, IL.
authors.forename: Elliot
authors.initials: E
authors.lastname: Abt
authors.affiliation: Division of Periodontology, Department of Developmental and Surgical Sciences, University of Minnesota, Minneapolis, MN.
authors.forename: Brian S
authors.initials: BS
authors.lastname: Michalowicz