The researchers based their findings on a review of 12 previous studies.

The researchers based their conclusions on a survey of more than 1,200 people, ages 18 to 65.

The researchers based their conclusions on a review of 29 previously published papers that offered conflicting evidence on the issue.

The researchers based their list of "risky" foods on studies of recent outbreaks.

The researchers based their findings on a review of blood samples dating back to 1958.

The researchers based their conclusions on a review of 19 studies that reported the smoking habits of 3,819 impotent men.

Dutch researchers based their findings on a study that followed the health of 545 Dutch men, ages 64 to 84, over a 15-year period.

The researchers based their conclusions on a review of seven studies that looked at stretching's role in preventing injuries or muscle soreness.

The researchers based their conclusions on a study of 78 families of deaf children.

The researchers based their findings on a review of seven earlier studies that followed people's diets and health over time.