1. Department of Geography, Center for Human Dynamics in the Mobile Age (Hdma), San Diego State University, San Diego, California, USA
2. Department of Management, Economics and Industrial Engineering, Politecnico di Milano, Milan, Italy
3. Center for Human Dynamics in the Mobile Age (HDMA), San Diego State University, San Diego, California, USA
4. Department of Communication, San Diego State University, San Diego, California, USA
5. Institute of Space Sciences & Astronomy (ISSA), University of Malta, Malta
6. Smart Lab, Procter & Gamble, Champaign, Illinois, USA
7. , Columbia University, New York, USA
8. AECOM, Newcastle, Australia
9. University of Bologna, Bologna, Italy
10. School of Pharmacy, University of College London (UCL), London, UK