1. Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-Sur-Alzette 4364, Luxembourg;
2. École de Bibliothéconomie et des Sciences de L’information, Université de Montréal, Montreal, QC H3T 1N8, Canada;
3. Observatoire des Sciences et des Technologies, Université du Québec à Montréal, Montreal, QC H3C 3P8, Canada;
4. Department of Science and Innovation-National Research Foundation Centre of Excellence in Scientometrics and Science, Technology and Innovation Policy, Stellenbosch University, Stellenbosch 7602, South Africa;
5. School of Public Policy, Georgia Institute of Technology, Atlanta, GA 30313;
6. Campbell School of Business, Berry College, Mount Berry, GA 30149