[1] Univ Massachusetts, Chan Med Sch, Dept Med, Worcester, MA 01003 USA
[2] Massachusetts Gen Hosp, Dept Med, Boston, MA USA
[3] Univ North Carolina Greensboro, Joint Sch Nanosci & Nanoengn, Greensboro, NC USA
[4] Univ Virginia, Med Sch, Dept Family Med, Charlottesville, VA USA
[5] Korle Bu Teaching Hosp, Dept Infect Dis, Accra, Ghana