1 Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois Urbana-Champaign, Urbana-Champaign, USA. [email protected].
2 Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois Urbana-Champaign, Urbana-Champaign, USA.
3 School of Medicine, New York University, New York, USA.
4 Saint Louis University, Saint Louis, USA.
5 World Health Organization Regional Office for Africa, Brazzaville, Congo.
6 Department of Geography, University of Illinois Urbana-Champaign, Urbana-Champaign, USA.