An elevated D-dimer level is not normal. It is usually found after a clot has formed and is in the process of breaking down. If you are having significant formation and breakdown of blood clot in your body, your D-dimer may be elevated. A negative D-dimer test means that a blood clot is highly unlikely.
Purpose [edit]. Counting impressions is the method by which most Web advertising is accounted and paid for, and the cost is quoted in CPI (cost per impression) .
Media bias is the perception that the media is reporting the news in a partial or prejudiced manner. Media bias occurs when the media seems to push a specific viewpoint, rather than reporting the news objectively. Keep in mind that media bias also occurs when the media seems to ignore an important aspect of the story.