They are thought to be fairly safe, although some experts have raised concerns about side-effects.
The squeeze in the mortgage market has intensified as lenders have raised rates and toughened terms.
Once the Democrats have raised taxes on high income earners, they are out of bullets.
In less than two weeks we have raised over 500K. The rest will happen quickly.
Private equity firms have raised billions from eager investors and can't spend the money fast enough.
Since April, banks, including Goldman Sachs, UBS, Lehman Brothers and Citigroup, have raised forecasts for aluminum.
For startups, even those that have raised venture capital, it is important to stretch the dollar.
Some groups have raised concerns the development could have an intrusive effect on the local area.
People have raised questions about the calculations on the numbers of bloggers for hire.
WSJ: America's Newest Profession: Blogging – Mark Penn, WSJ.com
Some have raised questions about whether Callan has continued to profit improperly through Alpha.
Btw, Chuck and TaxVox are hardly the only ones to have raised this issue.
Every penny we have raised, we have raised ourselves from supporters of our cause.
BBC: Children running alongside sign showing referendum date
Environmental campaigners have raised concerns that an offshore wind farm could damage the South Downs.
However, ministers say they provide an important gauge of children's progress and have raised standards.
Ten years ago such tight control of employees would hardly have raised an eyebrow.
The new technologies have raised legal issues that the original law did not address.
As the frequency of tracking has increased, more judges have raised the need for search warrants.
But a number of incidents have raised questions about the quality of the build-out.
Producers in Brazil rejected protection, because Brazilian tariffs would have raised their own prices.
They have raised the prospect of reaching many more students at a much lower cost.
As comedy, this would have raised a half smile out of Harvey, not much more.
But my wife and I at different times have raised six of my nieces.
Rumors that billionaire investor Carl Icahn is involved have raised interest in the announcement.
Northern District Salmon Fishery Board and Association of Salmon Fishery Boards (ASFB) have raised concerns.
Heavyweight Republican senators such as John McCain and Arlen Specter have raised sharp questions.
The idea that we should have raised the full cost of the project upfront is absurd.
WSJ: Our Stadium Project Is Properly Done �� Letters to the Editor
Local politicians have raised fears that some may not get an education at all.
We need to see some urgent movement as experts have raised some serious issues.
BBC: Poole harbour road layout plans still to be implemented
Some researchers have raised concern that release of gas hydrates could contribute to present-day global warming.
BBC: NEWS | Science/Nature | Past gives clue to climate impact
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