1 INDEPTH Network, Accra, Ghana; School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; Faculty of Public Health, Hanoi Medical University, Hanoi, Vietnam.
2 School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; WHO Collaborating Centre for Verbal Autopsy, Umeå Centre for Global Health Research, Department of Public Health and Clinical Medicine, Umeå University, 90187 Umeå, Sweden. Electronic address: peter.byass@epiph.umu.se.