1. Department of Computer Science, Georgia State University, Atlanta, GA, USA
2. Centers for Disease Control and Prevention, Division of Viral Hepatitis, Atlanta, GA, USA
3. Department of Computer Science, San Francisco State University, San Francisco, CA, USA
4. School of Mathematics, Georgia Institute of Technology, Atlanta, GA, USA
5. FHI 360, Durham, NC, USA
6. Division of Global HIV and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
7. Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA