1. Xi’an Jiaotong University, Xi’an, China
2. Western Technological Innovation Harbour, Xi’an, China
3. Centre for Research and Information on Substance Abuse, Uyo, Nigeria
4. Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
5. Makerere University School of Public Health, Kampala, Uganda
6. University of the Witwatersrand, Johannesburg, South Africa