1) total amount of research to investigate the modality, 2) methodological quality of research, 3) number of studies demonstrating improved outcomes, and 4) cost effectiveness.
There were a number of studies Power conducted to demonstrate better outcomes.
Cost effectiveness was not accounted for and is not relevant.
He did not greet them that day.
A man is posing in front of his family's barn.
A dozen boys play tag football at the school football field.
GAO must first be regarded as credible to carry out its responsibilities.
A socially valuable service should offer more rewards.
The mother and father are driving away.