Vitamin D is important for healthy bones and teeth and a lack of the vitamin has also been linked by some studies to high rates of multiple sclerosis in Scotland.
The railways' 80% share of the freight market in the 1950s has fallen by half and, some studies suggest, might fall to 25% as the roads improve further.
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But some studies, often funded by the companies involved, argue that the drugs should be more widely used--not only for people with mild to moderate Alzheimer's but also for those with the most severe form of the disease and patients who only have the first twinges of memory impairment.
Some recent studies also suggest that by 2015, more than 5.6 billion personal devices will be connected to mobile networks, and at least 788 million users will be connected to the Internet exclusively from mobile platform (see Mobile Africa Report 2011, p. 11).
Studies, some of them funded by the wireless industry, have produced contradictory findings.
Recent genetic studies generally contradict an earlier theory held by some archeologists that farming spread by cultural diffusion.
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Studies show most the population is now covered by some private or public plan.
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By the nineteen-nineties, studies showed that, for some ninety-five per cent of patients, the implants worked magnificently a decade after surgery.
But some studies show that these results may have been inflated by a lack of disclosure, Camerer says.
Studies by the International Union for Quaternary Research conclude that some ocean levels have even fallen in recent decades.
But, even when doctors look only at Merck's own rigorous studies, some say the heart risk became evident by 2001.
In Britain, that was the conclusion reached by a series of government-sponsored studies, which led to some attempts at corrective action.
The dust settled only in the last decade, according to some experts, following publication of studies from the Iraq war by Kragh and others that showed tourniquets were clear-cut lifesavers.
Rader says that even in a worst-case scenario, it might be possible to get the Amgen or Regeneron-Sanofi drugs approved for some limited slice of population before big studies, already started by both companies, to prove they reduce heart attacks and strokes are complete.
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Some parents are convinced autism is caused by mercury in vaccines, despite many studies to the contrary.
For example, some studies have shown that health campaigns may be terribly ineffective, by alienating rather than motivating their audiences into action.
Even some drug executives have backed doing more studies of the type done by FDA safety expert David Graham, who was one of those to warn about Vioxx.
Some studies have said the new rules will drive up car prices by thousands of dollars, forcing as many as 7 million Americans from the new car market, which, in turn, could hurt jobs.
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Multinational firms are a lot more productive than purely domestic ones, according to economists Rachel Griffith, Stephen Redding and Helen Simpson, in a working paper for the Institute for Fiscal Studies and there is some evidence that operations owned by foreign multinationals have higher labour productivity than those owned by British multinationals, partly because they invest more.
Some studies predict that the Vineyard will run out of land for development by 2005, Nantucket by 2037.
But the work is far from over, according to Savkar who says that some studies show that 40% of college students studying science drop the major by the end of their freshman year.
Some of the studies have been highly cited and widely publicized: one, by cognitive scientists Daphne Bavelier and Shawn Green of the University of Rochester in New York, published in Nature in 2003 2, has been cited more than 650 times, and was widely reported by the media as showing that video games boost visual skills.
It increased by some 120% in real terms between 1975 and 2003, according to the Institute for Fiscal Studies.
What we were interested in doing back in those early days of human molecular genetics was just trying to find out some basic information about inherited variation in our DNA. And it was purely by accident in those studies that we generated, totally out of the blue, what proved to be the very first DNA fingerprint.
"I've received hate mail in the past from some parents after they've read about the studies, but often find that many parents feel liberated by the research, " she said.
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