1 Division of HIV, Infectious Diseases & Global Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, California, USA.
2 Division of Infectious Diseases, University of California, San Francisco, San Francisco, California, USA.
3 Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA.
4 Department of Family and Community Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, California, USA.
5 Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, California, USA.
6 Quantitative Sciences Unit, Stanford University School of Medicine, Stanford, California, USA.
7 Division of Pediatric Infectious Diseases, Stanford University School of Medicine, Stanford, California, USA.
8 Division of Infectious Disease and Global Epidemiology, Department of Epidemiology and Biostatistics, University of California, San Francisco, California, USA.