1. Department of Sociology, School of Public Administration, Hohai University, Nanjing, China
2. Department of Demography and Social Statistics, Obafemi Awolowo University, Nigeria
3. Organization of African Academic Doctor (OAAD), Nairobi, Kenya
4. Key Laboratory of Environmental Medicine Engineering, Ministry of Education; Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, China
5. Biomedical Research Institute, Darfur University College, Nyala, Sudan
6. Department of Medical Microbiology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan
7. Department of Demography, College for Health, Community and Policy, The University of Texas at San Antonio, San Antonio, Texas, USA
8. Department of Philosophy of Science and Technology, University of Science and Technology of China, Hefei, China
9. Centre for Health Behaviours Research, Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, China, Hong Kong