1. Centre for General Practice, Department of Family Medicine and Population Health (FAMPOP), Faculty of Medicine and Health Sciences, University of Antwerp , Doornstraat 331, B-2610, Antwerp , Belgium
2. Laboratory of Medical Microbiology, Vaccine & Infectious Disease Institute (VAXINFECTIO), Faculty of Medicine and Health Sciences, University of Antwerp , Antwerp , Belgium
3. General Practitioners Cooperative Zuiderkempen , Geel , Belgium
4. General Practitioners Cooperative Regio Heist , Heist-op-den-Berg , Belgium
5. Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BIOSTAT), Data Science Institute (DSI), Hasselt University , Hasselt , Belgium