1 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands; Directorate of Research Policy, Leiden University Medical Center, Leiden, the Netherlands. Electronic address: b.siegerink@lumc.nl.
2 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands.
3 Directorate of Research Policy, Leiden University Medical Center, Leiden, the Netherlands.