The researchers tracked their health for an average of three years.

The researchers also tracked the medical records of the women for 15 years, on average.

Years later, the researchers tracked their rates of death and disease.

Researchers tracked 9,500 women for 12 years, starting when they were at least age 66.

Yet when researchers track the data within individual countries over time, they find a negative correlation.

Depending on how they shifted, the researchers could track what happened inside.

To find out whether this expectation was met, some researchers tracked over 3,000 players for 5 years.

For months, the researchers tracked a mysterious voice through the forest.

Researchers tracked information about medication use among 37,712 men aged 45 to 69 years between 2002 and 2003.

Then, the researchers tracked the women's health over the next five years and recorded how many developed Alzheimer's.