1Division of Environmental Health Science and Practice, Radiation Studies Section, Emergency Management, Radiation and Chemical Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE (MS S106-6), Atlanta, GA 30341-3717, USA
2Division of Emergency Operations, Plans, Training, Exercise and Evaluation Branch, Center for Preparedness and Response, Centers for Disease Control and Prevention, USA
3Contractor, GAP Solutions, Inc., Plans, Training, Exercise and Evaluation Branch, Center for Preparedness and Response, Centers for Disease Control and Prevention, USA
