All had at least one risk factor for heart disease.

VOA: special.2009.04.08

"It's a risk factor in a similar way that elevated cholesterol is a risk factor for heart disease."

VOA: standard.2010.03.09

"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

This new study combined a large number of previous studies and concluded that a lack of social interactions ranks right up with smoking,obesity, and alcoholism as a risk factor for death.

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

"We did not anticipate that there would be an increase in this group and we believe it may be an indicator of a new risk factor for gastric cancer which has not yet been identified."

VOA: standard.2010.05.12

She was widely recognized by other researchers for her work with a protein called transforming growth factor-beta.

VOA: special.2009.01.27

For example, drugs like Enbrel and Remicade block tumor necrosis factor.

VOA: special.2010.06.15

For example,drugs like Enbrel and Remicade block tumor necrosis factor.

VOA: special.2009.04.14

So,that is being a factor that is constraining for the progress for those countries."

VOA: standard.2009.05.21

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