Ethics statement
Ethics approval was obtained from the following national and local committees and authorities: The Human Research Ethics Committee of the Northern Territory Department of Health (HREC), Australia, the Islamic Republic of Afghanistan, Ministry of Public Health, Institutional Review Board, Afghanistan, the National Research Ethics Review Committee (NRERC), Ethiopia, the Scientific & Ethical Review Committee (SERC), Ethiopian Public Health Institute, Ethiopia, the Food Medicine and Health Care Administration and Control Authority (FMHACA), Ethiopia, the Health Research Ethics Committee of the Faculty of Medicine University of Indonesia, Indonesia, the Indonesian Food and Drug Agency (BPOM), Indonesia, the Oxford Tropical Research Ethics Committee (OxTREC), UK, and the Ministry of Health Evaluation Committee on Ethics in Biomedical Research, Vietnam.