title: Response to Astley's Letter to the Editor.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia.|Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Claire D
authors.initials: CD
authors.lastname: Coles
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Amanda R
authors.initials: AR
authors.lastname: Gailey
authors.affiliation: Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia.|Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Jennifer G
authors.initials: JG
authors.lastname: Mulle
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia.|Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Julie A
authors.initials: JA
authors.lastname: Kable
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Mary Ellen
authors.initials: ME
authors.lastname: Lynch
authors.affiliation: Department of Pediatrics, University of California at San Diego, La Jolla, California.
authors.forename: Kenneth Lyons
authors.initials: KL
authors.lastname: Jones