[1] Cornell Univ, Weill Med Coll, Funct Neuroimaging Lab, Ithaca, NY 14853 USA
[2] NYU, Dept Psychiat, Ctr Child Study, New York, NY 10016 USA
[3] NYU, Dept Psychol, New York, NY 10016 USA
[4] NYU, Ctr Neural Sci, New York, NY 10003 USA
[5] NIDA, MRI Phys Unit, Neuroimaging Res Branch, NIH, Washington, DC USA
[6] Mt Sinai Sch Med, Dept Psychiat, New York, NY 10029 USA