Figure 1.

Schematic flow charts of study design and selection or follow-up of patients in case and control groups. A – Study design and patient selection. B – Schematic diagram of follow-up and exclusion of previous events in both groups

AF – atrial fibrillation, CHF – congestive heart failure, CMV – cytomegalovirus, DM – diabetes mellitus, F/U – follow-up, ICD-10 – the International Statistical Classification of Diseases and Related Health Problems 10th Revision, MI – myocardial infarction, NHID – the National Health Insurance Database.