title: Reply.
authors.affiliation: Uniformed Services University, Bethesda, Md.
authors.forename: Arlene J
authors.initials: AJ
authors.lastname: Hudson
authors.affiliation: Uniformed Services University, Bethesda, Md.
authors.forename: David R
authors.initials: DR
authors.lastname: Whittaker
authors.affiliation: Uniformed Services University, Bethesda, Md.
authors.forename: Dale F
authors.initials: DF
authors.lastname: Szpisjak
authors.affiliation: Uniformed Services University, Bethesda, Md.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Lenart
authors.affiliation: Uniformed Services University, Bethesda, Md.
authors.forename: Mercedes M
authors.initials: MM
authors.lastname: Bailey