“…A distinction must be made between the formal statistical exercise and the practical results obtained in the field, as the latter may modify the initial findings. As such, crosschecking of data sources should be applied more often and completed with cohort surveys (Sherman, Yingkai, & Kral, 2007). More qualitative local studies involving outreach workers with solid knowledge of their field and geographical area are also to be considered (Miotto, McCann, Rawson, Frosch, & Ling, 1997).…”