Figure 1

The map of the trial area. The trial participants’s homes are marked with black dots. The geographic data was collected later, during the years 2008-2009. In the insert, map of the Philippines showing Bohol and in the Bohol map the 6 municipalities included in the trial are colored with yellow. Base map: http://www.openstreetmap.org/?lat=9.6708&lon=123.9147&zoom=12&layers=M.