Thirty-nine percent took five years.

VOA: special.2009.07.23

Five years later, Doctor Hennekens reported that those who took aspirin reduced their risk of a heart attack.

VOA: special.2009.10.20

Five years later, Doctor Hennekens reported that people who took aspirin reduced their risk of a heart attack.

VOA: special.2010.12.14

It took seventy-five jewelers three years to complete.

VOA: special.2011.03.16