title: Reply.
authors: Bethesda, Maryland.
authors: Austin R
authors: AR
authors: Fox
authors: Los Angeles, California.
authors: Lynn K
authors: LK
authors: Gordon
authors: Ann Arbor, Michigan.
authors: John R
authors: JR
authors: Heckenlively
authors: Miami, Florida.
authors: Janet L
authors: JL
authors: Davis
authors: Chicago, Illinois.
authors: Debra A
authors: DA
authors: Goldstein
authors: Cleveland, Ohio.
authors: Careen Y
authors: CY
authors: Lowder
authors: Bethesda, Maryland.
authors: Robert B
authors: RB
authors: Nussenblatt
authors: Boston, Massachusetts; Jamaica Plain, Massachusetts.
authors: Nicholas J
authors: NJ
authors: Butler
authors: Washington, DC.
authors: Monica
authors: M
authors: Dalal
authors: Ann Arbor, Michigan.
authors: Thiran
authors: T
authors: Jayasundera
authors: Rochester, Minnesota.
authors: Wendy M
authors: WM
authors: Smith
authors: Bristol, United Kingdom.
authors: Richard W
authors: RW
authors: Lee
authors: Portland, Oregon.
authors: Grazyna
authors: G
authors: Adamus
authors: Bethesda, Maryland.
authors: Chi-Chao
authors: CC
authors: Chan
authors: Bethesda, Maryland.
authors: John J
authors: JJ
authors: Hooks
authors: Portland, Oregon.
authors: Catherine W
authors: CW
authors: Morgans
authors: Baltimore, Maryland.
authors: Barbara
authors: B
authors: Detrick
authors: Bethesda, Maryland.
authors: H Nida
authors: HN
authors: Sen