"The Nordic countries are world-famous within the research community for their ability to conduct register-based health- and welfare-oriented population studies. Legislation in most countries in the Nordic region allows researchers to carry out studies linking various registers by means of the individual personal identification number allocated to each person. This provides a unique source of data, which is invaluable for the public health community. I will be giving high priority to the publication of such linked register-based research as part of the editorial policy." This statement appeared in my editorial in 2008 when as Chief Editor I took over and reviewed the policy of the journal [1]. Over the years many register-based research works have been published in the journal.
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