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Consort diagram of the study population. Between January 1996 and April 2018, 109 362 cardiac implantable electronic device surgeries were performed in Denmark. A total of 868 surgeries were excluded from the analysis due to misclassification, loss to follow-up, and emigration resulting in 108 494 surgeries. ICD, implantable cardioverter-defibrillator; CIED, cardiac implantable electronic device.
