Last year,a study in the medical journal Neurology found smoking to be an established risk factor in developing the disease.

VOA: special.2010.03.09

"While cost remains a major factor in decisions about where to off-source, the quality of the labor pool is gaining importance, and this includes English language skills."

VOA: special.2011.01.21

Weather is not believed to be a factor. Witnesses say they did not see any fire before the plane broke apart.

VOA: standard.2010.05.12

In order to attract the rabbit's own stem cells to re-grow the cartilage, channels in the scaffold were filled with a growth factor protein.

VOA: standard.2010.08.11

"We know that it is a risk factor but we can't attribute the rise in autism to the shifting trend towards having children later in life."

VOA: standard.2010.02.10

"Exposure to tobacco smoke is a risk factor for cardiac disease already in adolescents, and that's why this study supports that children and adolescents need smoke-free environments."

VOA: standard.2010.03.04

O'Connor says cost could be a factor in deciding to use this treatment.

VOA: standard.2010.08.11

Many Cuban Americans say money should not be a factor in regard to the embargo as long as the Cuban government represses freedom and aggressively opposes US policies.

VOA: standard.2010.07.29

Therefore,steps were taken virtually to abolish it,'". While systemic failure was the key factor for some observers, others highlight the role played by individuals working to defeat Soviet communism from within.

VOA: standard.2009.11.03

The paper's authors tried to take into account other factors, but they admit it may not have been entirely possible to quantify differences in, for example,the recipient's health, which can be a big factor in the success of a transplant.

VOA: standard.2010.07.14

Major rifts within the opposition have been cited as the biggest factor likely to thwart efforts by their leader Anwar Ibrahim to win control of government at the next election,due by 2013, although some analysts say a poll could be held as early as next year.

VOA: standard.2009.12.21

"If we refuse to take into account the full costs of our fossil fuel addiction - if we don't factor in the environmental costs and the national security costs and the true economic costs - we will have missed our best chance to seize a clean energy future."

VOA: standard.2010.06.14