Affiliation: | a National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland, USA ; b Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, USA ; c Archaeal Virology Unit, Institut Pasteur, Paris, France ; d Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, Maryland, USA |