W. Douglas Evans, PhD
W. Douglas Evans, PhD
![142nd APHA Annual Meeting and Exposition (November 15 - November 19, 2014): http://www.apha.org/events-and-meetings/annual](images/banner.jpg)
George Washington University School of Public Health and Health Services
Washington,
DC
USA
wdevans@gwu.edu
George Washington University School of Public Health and Health Services
Washington,
DC
USA
wdevans@gwu.edu