1. Department of Epidemiology (O.L.R.-O., M.K.), Erasmus MC – University Medical Center Rotterdam, The Netherlands.
2. Electrocardiography Research Group, Department of Basic Sciences, School of Medicine, Universidad Industrial de Santander, UIS, Bucaramanga, Colombia (O.L.R.-O.).
3. Department of Biostatistics (D.R.), Erasmus MC – University Medical Center Rotterdam, The Netherlands.