1. United States Army Medical Research Institute of Infectious Diseases, Fort Detrick 21702 Frederick MD USA
2. Janelia Research CampusHoward Hughes Medical Institute 20147 Ashburn VA USA
3. Optical Microscopy and Analysis Laboratory, Leidos Biomedical Research, Inc.Frederick National Laboratory for Cancer Research 21702 Frederick MD USA
4. Integrated Research Facility at Fort DetrickNational Institute of Allergy and Infectious Diseases, National Institutes of Health 21702 Frederick MD USA