1. The Research Institute at Nationwide Children's Hospital, Center for Vaccines and Immunity, 700 Children's Drive, Columbus, OH 43205, USA
2. The Ohio State University, College of Medicine, Department of Pediatrics, Columbus, OH 43205, USA
3. Emory University School of Medicine, Department of Microbiology and Immunology, 1510 Clifton Road, Atlanta, GA 30322, USA
4. Measles, Mumps, Rubella and Herpesviruses Laboratory Branch, 1600 Clifton Road, MS-C-22, Atlanta, GA 30333, USA
5. Commonwealth Scientific Industrial Research Organization, Australian Animal Health Laboratory, 5 Portarlington Road, East Geelong, Victoria, Australia