title: Authors' response.
authors.affiliation: School of Dentistry, Department of Dental Practice and Rural Health, School of Public Health, Department of Epidemiology, West Virginia University, Morgantown, WV.
authors.forename: R Constance
authors.initials: RC
authors.lastname: Wiener
authors.affiliation: School of Pharmacy, Department of Pharmaceutical Systems and Policy, West Virginia University, Morgantown, WV.
authors.forename: Usha
authors.initials: U
authors.lastname: Sambamoorthi
authors.affiliation: Department of Oral Medicine, School of Dentistry, West Virginia University, Morgantown, WV.
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Jurevic