Within a survey of mountain forest types in the Swiss Alps, we compared three statistical sampling methods, i.e. stratified random sampling of the investigation area, systematic sampling and ...

A flexible sampling model is outlined for use in a spatial context. The new method is designed to distribute the available samples in such a way that areas of greatest vegetational heterogeneity are ...

Challenges encountered during implementation of the program are unique to each country. We conducted this systematic review to list the challenges in implementing primary HPV screening through ...