. 2013 Oct 23;90(6):1194–1204. doi: 10.1007/s11524-013-9837-4
© The Author(s) 2013
Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
Figure 1.
Map of case study sites.