1. Waterborne Disease Prevention Branch, DFWED/NCEZID, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. ASRT, Inc., Smyrna, Georgia, USA
3. Eagle Medical Services, Atlanta, Georgia, USA
4. IHRC, Inc., Atlanta, Georgia, USA
5. Biotechnology Core Facility Branch, DSR/NCEZID, Centers for Disease Control and Prevention, Atlanta, Georgia, USA