1. Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
2. Department of Pediatrics, Faculty of Medicine, University of Kinshasa, P.O. Box 747, Kinshasa, Democratic Republic of the Congo
3. Department of Pediatrics, Faculty of Medicine, Catholic University of Bukavu, P.O. Box 285, Bukavu, South Kivu, Democratic Republic of the Congo
4. Department of Tropical Medicine, Infectious and Parasitic Diseases, Faculty of Medicine, University of Kinshasa, P.O. Box 747, Kinshasa, Democratic Republic of the Congo