1 Biology Department, Perm State University, Perm, Russia.
2 Institute of Ecology and Genetics of Microorganisms of the Ural Branch of the Russian Academy of Sciences, Perm Federal Research Center of the Ural Branch of the Russian Academy of Sciences, Perm, Russia.
3 Department of Medicine, Division of Infectious Diseases and HIV Medicine, Case Western Reserve University, Cleveland, OH, United States.
4 Division of Experimental Medicine, University of California, San Francisco, San Francisco, CA, United States.