Ethics approval and consent to participate
The study received full ethical approval from the Human Research Ethics Committee of the Northern Territory Department of Health (HREC), the Oxford Tropical Research Ethics Committee (OxTREC), the Institutional Review Board at the Ministry of Public Health of the Islamic Republic of Afghanistan, the National Research Ethics Review Committee (NRERC) in Ethiopia, the Health Research Ethics Committee of the Faculty of Medicine University of Indonesia and the Ministry of Health Evaluation Committee on Ethics in Biomedical Research in Vietnam. All study activities were carried out in accordance with the Declaration of Helsinki. Written informed consent was obtained from all subjects and/or their legal guardian(s).