2 Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA.
3 Arthritis & Rheumatic Disease Specialties, Aventura, Florida, USA.
4 Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, California, USA.
5 Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, California, USA.