Tracking teens with GPS-enabled cell phones to study contextual exposures and adolescent alcohol and risk behavior

Hilary F. Byrnes, Ph.D.1, Brenda A. Miller, Ph.D.2, Sarah Wiehe, MD, MPH3, Douglas J. Wiebe, PhD4, Christopher Morrison, MPH4 and Lillian Remer, MA, GISP2
(1)Pacific Institute for Research and Evaluation, Berkeley, CA, (2)Pacific Institute for Research and Evaluation, Oakland, CA, (3)Indiana University School of Medicine, Indianapolis, IN, (4)University of Pennsylvania, Philadelphia, PA