ThygesenLCErsbøllAK. When the entire population is the sample: Strengths and limitations in register-based epidemiology. Eur J Epidemiol2014;29:551–558.
2.
SønderskovKMDinesenPT. Danish exceptionalism: Explaining the unique increase in social trust over the past 30 years. Eur Sociol Rev2014;30:782–795.
3.
LudvigssonJFHåbergSEKnudsenGP, et al. Ethical aspects of registry-based research in the Nordic countries. Clin Epidemiol2015;7:491–508.
4.
FrankL. When an entire country is a cohort. Science2000;287:2398–2399.
5.
SchmidtMSchmidtSAJAdelborgK, et al. The Danish health care system and epidemiological research: from health care contacts to database records. Clin Epidemiol2019;11:563–591.
6.
SørensenHTSabroeSOlsenJ. A framework for evaluation of secondary data sources for epidemiological research. Int J Epidemiol1996;25:435–442.
7.
Maret-OudaJTaoWWahlinK, et al. Nordic registry-based cohort studies: Possibilities and pitfalls when combining Nordic registry data. Scand J Public Health2017;45 (Suppl 17):14–19.
