The geocoded home address was used to assign a level of geographically concentrated county poverty using data obtained from the 2000 U.S. Census.
Other studies have found high levels of divergence among geographically structured clades [ 6, 16, 17], many of which deserve protection as evolutionarily significant units [ 18].
While the non-merozoite antigens showed geographically variable levels of diversity and geographic restriction of specific subgroups, the merozoite antigens had high levels of diversity globally, and a worldwide distribution of each subgroup.
We have shown only low levels of genetic differentiation between geographically distinct whale shark populations.
In your region, this would require several centres with differing levels of expertise that are geographically separated.
Many studies indicate that northern animal populations exhibit low levels of genetic diversity over geographically widespread areas whereas southern populations exhibit relatively high levels.
These genes are classic examples of positively selected genes in European populations, indicating that some of our PCAIMs are picking up high levels of differentiation due to geographically restricted positive selection, rather than due to neutral genetic drift.
To see how PFOA levels compared geographically, toxicologist Kurunthachalam Kannan of the State University of New York, Albany, who led the survey, gathered 473 blood-bank samples from the United States, Colombia, Brazil, Belgium, Italy, Poland, India, Malaysia, and Korea.
The markers developed in this study will be useful for population genetic research to investigate effective population size and levels of gene flow between the geographically isolated populations.
This is a strong indication that no confusion arose or is likely to arise either from concurrent use of the marks at the retail level in geographically separate trading areas or from its concurrent use at different market levels, viz.
The large scale and multicentred requirements of the evaluation pose challenges with regards to recruitment of participants at multiple levels, namely geographically (General Practice Networks), HCPs and subsequently individual patients.
