1. Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
2. Michael Smith Laboratories, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
3. Center for Global Health Science and Security, Georgetown University, Washington, DC 20057, USA
4. Heidelberg Institute of Global Health, University of Heidelberg, 69120 Heidelberg, Germany