1. Department of Geography, University of Connecticut, Storrs, CT, USA
2. Institute for Collaboration on Health, Intervention, and Policy (Inchip), University of Connecticut, Storrs, CT, USA
3. Graduate School of Geography, Clark University, Worcester, MA USA
4. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China
5. Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, ID USA