News FocusEpidemiology

When an Entire Country Is a Cohort

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Science  31 Mar 2000:
Vol. 287, Issue 5462, pp. 2398-2399
DOI: 10.1126/science.287.5462.2398

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Denmark has gathered more data on its citizens than any other country. Now scientists are pushing to make this vast array of statistics even more useful by easing restrictions on the use of data coded by personal identification numbers. But government officials are reluctant to do so, citing privacy concerns.