[1] Monash Univ, Dept Epidemiol & Prevent Med, Alfred Hosp, Melbourne, Vic 3004, Australia
[2] Univ Melbourne, Royal Melbourne Hosp, Victorian Infect Dis Serv, Ctr Clin Res Excellence, Melbourne, Vic 3050, Australia
[3] Mt Auburn Hosp, Cambridge, MA USA
[4] Harvard Univ, Sch Med, Boston, MA USA
[5] Harvard Univ, Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA 02115 USA
[6] Univ Alabama, William C Gorgas Ctr Geog Med, Div Infect Dis, Birmingham, AL USA
[7] Univ Melbourne, Dept Med, Melbourne, Vic 3010, Australia