This research is crucial as the field progresses from evaluating efficacy in research settings to examining effectiveness in the current, complex health care delivery system.
This research isn't crucial as the field progresses from evaluating efficacy 
mnli hypothesis: This research isn't crucial as the field progresses from evaluating efficacy  premise: This research is crucial as the field progresses from evaluating efficacy in research settings to examining effectiveness in the current, complex health care delivery system.