1. Center for Biosecurity of the University of Pittsburgh Medical Center, Baltimore, Maryland.
2. Center for Biosecurity of the University of Pittsburgh Medical Center, 621 E. Pratt St., Ste. 210, Baltimore, MD 21202. mmair@upmc-biosecurity.org
3. Center for Biosecurity of University of Pittsburgh Medical Center, Baltimore, Maryland.
4. Health Care Systems Department, Wharton School, University of Pennsylvania, Philadelphia.