"These studies confirm the results of prior studies and build on them," said Dr. Carolyn Clancy, acting director of the Agency for Health Care Research and Quality in Rockville, Md., which paid for the Birkmeyer study.
"This paper says it will not pre-empt a common cold, and it stands on top of prior studies saying it doesn't treat an established cold," he said, adding, "We've got to stop attributing any efficacy to echinacea".
The measurements used in this study were developed through reviews of prior studies.
Limitations of prior studies, and directions for future research are presented.
This paper describes methods used to overcome limitations of prior studies.
This is in agreement with the results of prior studies of Cu adsorption on kaolinite (e.g., [23 28]).
This was within the range of prior studies in Uganda, Ghana and Tanzania reported as 49%, 29% and 33%, respectively.
In this paper, like most of prior studies, we consider the long-term average revenue as the main performance metric.
This study builds on the findings of prior studies by examining the epidemiology of soccer-related injuries across the lifespan.
A number of prior studies, conducted on interface signs focused on the importance of sign ontology [12, 13].
The findings appear to mirror the results of prior studies done in other developing countries (Savage, 1994).
