[1] Univ Utrecht, Fac Vet Med, Utrecht, Netherlands
[2] Univ London Imperial Coll Sci Technol & Med, Sch Publ Hlth, London, England
[3] Roskilde Univ, Roskilde, Denmark
[4] Georgetown Univ, Washington, DC USA
[5] MRC, Biostat Unit, Cambridge CB2 2BW, England
[6] WHO, CH-1211 Geneva, Switzerland
[7] London Sch Hyg Trop Med, Ctr Math Modelling Infect Dis, London, England
[8] Univ Cambridge, Cambridge, England
[9] Univ Warwick, Sch Life Sci, Coventry CV4 7AL, W Midlands, England
[10] Univ Liverpool, Sch Trop Med, Liverpool L69 3BX, Merseyside, England
[11] Univ Warwick, Warwick Math Inst, Coventry CV4 7AL, W Midlands, England
[12] UCL, Dept Stat Sci, London, England
[13] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA
[14] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA USA
[15] Univ Oxford, Dept Zool, Oxford, England
[16] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA
[17] Heriot Watt Univ, Edinburgh, Midlothian, Scotland
[18] Univ Florida, Dept Biol, Emerging Pathogens Inst, Gainesville, FL USA
[19] NIH, Div Int Epidemiol & Populat Studies, Fogarty Int Ctr, Bethesda, MD 20892 USA
[20] Massey Univ, Inst Nat & Math Sci, Auckland, New Zealand