Internet and ivr survey: Choice, engagement, data equivalency

Santosh K. Verma, ScD, MPH, MBBS1, Theodore K. Courtney, MS, CSP1, Wen R. Chang, PhD1, David A. Lombardi, PhD1, Yueng-hsiang (Emily) Huang, PhD1, Melanye J. Brennan, MS1 and Melissa J. Perry, ScD2
(1)Liberty Mutual Research Institute for Safety, Hopkinton, MA, (2)The George Washington University, Washington DC, DC