1. Centre for Science and Technology Studies (CWTS), Leiden University, Leiden, Netherlands
2. Clarivate Analytics, Dubai Internet City, Dubai, United Arab Emirates
3. Delft Institute of Applied Mathematics (DIAM), TU Delft, Netherlands
4. DST-NRF Centre of Excellence in Scientometrics and Science, Technology and Innovation Policy, Stellenbosch University, Stellenbosch, South Africa