title: Authors' response.
authors.affiliation: Professor and Dean, College of Dentistry, University of Iowa, Iowa City, IA.
authors.forename: David C
authors.initials: DC
authors.lastname: Johnsen
authors.affiliation: Professor and William Feagans Chair, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY; Editor, The Journal of the American Dental Association.
authors.forename: Michael
authors.initials: M
authors.lastname: Glick