title: Authors' response.
authors.affiliation: Associate Professor, Division of Periodontology, Department of Development and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN.
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Skaar
authors.affiliation: Professor, Division of Health Policy & Management, School of Public Health, University of Minnesota, Minneapolis, MN.
authors.forename: Karen M
authors.initials: KM
authors.lastname: Kuntz