1. Center for Health Informatics, School of Information Sciences, University of Illinois Urbana-Champaign.
2. ianb@illinois.edu
3. Pan American Health Organization, Washington, D.C. United States of America
4. National Center for Supercomputing Applications, University of Illinois Urbana-Champaign, Urbana, United States of America
5. The Rudolph Matas Library of the Health Sciences, Tulane University Health Sciences Center, New Orleans, United States of America
6. Department of Sociology, University of Illinois Urbana-Champaign, Urbana, United States of America
7. Mind, Behavior and Development Unit, World Bank, Washington, D.C. United States of America