title: Reply.
authors.affiliation: Baylor College of Medicine, Houston, TX. Electronic address: slclark@bcm.edu.
authors.forename: Steven L
authors.initials: SL
authors.lastname: Clark
authors.affiliation: Perigen Inc., Princeton, NJ.
authors.forename: Emily H
authors.initials: EH
authors.lastname: Hamilton
authors.affiliation: University of California, Irvine, Irvine, CA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Garite