So many factors can affect alertness and energy levels, and they vary so much over the life span, that many people with sleep disorders never realize they have one.
That would help to explain why they vary so much from country to country.
Prices vary so much we need to know what people feel comfortable spending for their ring.
But types of debt vary so much that this is not a realistic goal.
All vary so much from one season to the next that they aren't particularly useful for predicting future performance.
There are a lot of complex reasons why healthcare prices vary so widely.
This sort of prescience from a Chinese company has so far been vary rare, but I do see it slowly increasing.
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The next step will be to find out why the length of telomeres can vary so much from individual to individual.
Apart from secrecy, one reason why the estimates of the nuclear arsenals vary so much is that some of the weapons may not be fully assembled.
That makes it hard to introduce uniform pricing of derivatives, because the penalties (or lack of them) for defaulting vary so much from one jurisdiction to another.
More worrying to Dr Noteborn, however, is that potatoes are tricky plants to use in feeding trials because they vary so much from tuber to tuber in a range of vitamins, starches, proteins and significantly natural poisons.
With the best will in the world and the most energetic efforts to create codes, talk to stakeholders and support hospitals and schools, companies can still find themselves uncomfortably exposed, especially as what is expected of them can vary so much from country to country.
The authors make the sobering point that mortality rates for doctors vary so much that, even if he had been constantly monitored, Harold Shipman (a British doctor who murdered at least 200 patients) would have racked up a body-count of several dozen before coming to official attention.
This one was done in Spain, so other regions may vary in terms of prevalence.
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Spreads vary, so be aware that you might be able to find a better price from another broker.
The Labor Department determines prevailing wage based on rates prevailing in specific localities, so that it would vary from city to city.
The Labor Department would determine prevailing wage based on customary rates in specific localities, so that it would vary from city to city.
Keep in mind that you're not actually downloading the books -- so your mileage will vary, depending on the quality of your Internet connection.
Just as wine vintages vary, so the weather can affect the number of harvests a coca plant yields and the alkaloid content of the leaves.
What if the million or so Muslims (estimates vary) who had gathered in rice fields at Raiwind, near Lahore, were roused from devotion to march on the capital of Pakistan's biggest province?
It's hard to fathom that it's taken this long, but hey, we'll take it -- unfortunately, it's up to each carrier to decide when they're going to deploy BIS upgrades, so your mileage may vary on the wait time.
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The devil is in the details, here: campaign budgets vary, and so do celebrity price tags.
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Offers vary by card so read the fine print to see if the incentive is cash back or fuel credits.
Everyone learns differently, so these are going to vary by person.
The Environment Agency, which licensed the site, has now agreed to vary its conditions so waste contractor Grundon, which owns the land, can spread the compost out.
The recommendations vary significantly, so providers and patients remain confused.
That synergy derives most importantly from the fact that demand in commercial and military aerospace markets tends to vary inversely, so that it is strengthening in one segment as it is weakening in the other.
Websites that dynamically serve content optimized for a mobile experience on the same URL should notify Google via the Vary HTTP header so that Googlebot-Mobile crawls and indexes mobile content for inclusion in the mobile index.
So estimates of civilian deaths vary greatly.
BBC: NEWS | Special Reports | 629 | 629 | Iraq violence in figures
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