aThe Epidemiology and Prevention Interventions Center, Division of Infectious Diseases, San Francisco General Hospital, University of California, San Francisco, CA, USA; bThe Positive Health Program, San Francisco General Hospital, University of California, San Francisco, CA, USA; cDepartment of Epidemiology and Biostatistics, San Francisco General Hospital, University of California, San Francisco, CA, USA; dAlcohol Research Group, Public Health Institute, Berkeley, CA, USA; and eDivision of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Palo Alto, CA, USA.