Researchers involved in the PVD study undergo thorough training in epidemiology, medicine, medical ethics, and community-based participatory research (CBPR) from leaders in their fields in both Brazil and the United States.

All projects described were approved by human subjects boards from both the University of California, Berkeley, and the Universidade Federal Fluminense. The Family Health Program (PMF)of Niterói graciously approved the study's conduct and protocols in their health posts and regional polyclinic where the research is taking place.