Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, California, United States of America.|Cellular and Molecular Pharmacology, University of California at San Francisco, San Francisco, California, United States of America.|Division of Infectious Diseases, University of California at San Diego School of Medicine, La Jolla, California, United States of America.|Division of Infectious Diseases, University of California at San Diego School of Medicine, La Jolla, California, United States of America.|Cellular and Molecular Pharmacology, University of California at San Francisco, San Francisco, California, United States of America.|Cellular and Molecular Pharmacology, University of California at San Francisco, San Francisco, California, United States of America.|Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, California, United States of America.