Robyn Stephens
Robyn Stephens
![142nd APHA Annual Meeting and Exposition (November 15 - November 19, 2014): http://www.apha.org/events-and-meetings/annual](images/banner.jpg)
Senior Research Specialist
Social and Scientific System, Inc.
Durham,
NC
USA
rstephens@s-3.com
4222.0 Predictors of response and mode of response in the Environmental Polymorphisms Registry (EPR) Health and Exposure Survey