This is the first study with national data on the prevalence of ED in the United States. ED varies by age, with 5 percent of men aged 20 to 40 having ED, to 70 percent of men 70 and older.

This is the first study with national data on the prevalence of ED in the United States.

National surveys and other studies have told us that the United States has a major weight problem, but this study suggests that we could have an even more serious degree of overweight and obesity (cases) over the next few decades.

This is the first large, population-based study evaluating liver transplantation in the United States. Marked ethnic differences in receipt of transplants should be examined further, and reasons for these disparities clarified.

The Iraqis will choose who will be their next prime minister. The United States continues to urge the Iraqis to form a government of national unity with strong leadership.

The USDA (United States Department of Agriculture) used to have responsibility for school lunches and breakfasts, ... They had jurisdiction to compete against vending machines. But much of that was taken away 10 years ago.