GOPALDAS: Columbia University Irving Medical Center, New York State Psychiatric Institute, New York, NY

FLOOK: Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA

BLACKFORD: University of Nebraska Medical Center, Munroe-Meyer Institute, Omaha, NE

National Institutes of Health: NIDA 5T32DA007294 (M.G.).

The authors declare no conflicts of interest.

Please send correspondence to: Manesh Gopaldas, MD, Columbia University Irving Medical Center, New York State Psychiatric Institute, 1051 Riverside Drive, Unit 66, Office 3736, New York, NY 10032 (e-mail: [email protected]).