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Hospital staff nurses who work extended hours, work at night, struggle to remain awake at work, or obtain less sleep are more likely to experience a drowsy driving episode.

Scientists here have found that mini-molecules called micro-RNA may play a critical role in the progression of chronic myeloid leukemia from its more treatable chronic phase to a life-threatening phase, called blast crisis. Furthermore, they discovered an entirely new function for these molecules. The researchers show that microRNAs can sometimes directly control a protein's function -- not just whether or not the protein is made by the cell, as has been believed.

Experts were asked to name the one intervention that would improve the health of those living on less than $1 a day. The collected responses--from health researchers and activists, journalists, academics, and communities living in poverty--highlight effective, low tech, and remarkably cheap ways to make a profound difference to the lives of the poorest people on the planet.

The American Association of Physicists in Medicine says CT scans are a critical part of medical care and questions the statistical method used in the New England Journal of Medicine article linking CT scans to cancer.

Better diets for fighting diabetes, obesity and heart disease may soon be only a finger-prick away. By analyzing the unique metabolic changes in an individual's body, researchers hope to develop more personalized dietary guidelines for improving health, according to a new article.

Early-stage breast cancer that has not yet invaded the surrounding tissues may already contain highly motile cells, bringing the tumor one step closer to metastasis. This study suggests that these cells, although not yet invasive, could wander off along milk ducts and seed new tumors within the same breast.

Most people wouldn't consider anthrax toxin to be beneficial, but this bacterial poison may someday be an effective cancer therapy. Anthrax toxin has actually been shown to be fairly selective in targeting melanoma cells, although the risk of non-cancer toxicity prevents any clinical use.

Since the year 2000, much has been learned about the potential for using transplanted cells in therapeutic efforts to treat varieties of cardiac disorders. Cardiac stem cell therapy involves delivering a variety of cells into hearts following myocardial infarction or chronic cardiomyopathy. A brief overview of current research and research goals is presented, followed by a summary of results of studies aimed at improving implanted cell survival and the repair process, as well as several techniques aimed at improving efficacy.