Exact(1)
The study will be limited by the ecological before and after design, and the difficulties of ascribing causality to vaccine, as well as the inherent risks of bias and confounding in observational studies particularly due to underlying secular trends.
Similar(59)
How long will it be before ecological concerns collide with literature?
Then the mammals took over evolving to fill ecological roles that before then had been taken by the dinosaurs.
Despite the new direction, NCEAS will try to serve the broader ecological community as before, Davis says.
A leading example is the Ash Project in Kent, an initiative that promotes the tree's national and ecological importance, "before it is too late".
Eco-design aims to enhance eco-engineering practices of coastal infrastructure projects in support of ecological functions before these projects are developed and implemented.
In 2015, under Obama, the B.L.M. offered up many of the same parcels for lease, then deferred the auction, noting the need for a closer analysis of the land's cultural, archeological, and ecological value before development could begin.
Along with a new tramway, widened bus routes and pedestrianised weekend quai-side roads, Mr Delanoë's Paris in many ways captured the ecological mood before it became fashionable.All the same, as Mr Sarkozy has lamented, Paris seems to lack London's dynamism.
We first discuss the ecological implications, before addressing the wider implications.
During an ecological survey before construction of a dike, Jerrine Nichols, a benthic ecologist at the U.S. Geological Survey in Ann Arbor, Michigan, says she found five clams in a protective sandbar.
The researchers said they now plan to study moss core records dating back thousands of years to get a clearer picture of ecological changes before and after human-caused climate change. .
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