1 The Center for Infectious Disease Research, Seattle, WA, USA.
2 South African Tuberculosis Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine, Department of Paediatrics and Child Health, University of Cape Town, Cape Town, Rondebosch 7700, South Africa.
3 South African Tuberculosis Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine, Department of Paediatrics and Child Health, University of Cape Town, Cape Town, Rondebosch 7700, South Africa. Electronic address: willem.hanekom@gatesfoundation.org.