1Centre for General Practice, Primary and Interdisciplinary Care Antwerp (Eliza), University of Antwerp, Antwerp, Belgium,
2Laboratory of Medical Microbiology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, Antwerp, Belgium,
3Cochrane Institutes of Primary Care and Public Health, School of Medicine, Cardiff University, Cardiff, United Kingdom,
4South East Wales Trials Unit, School of Medicine, Cardiff University, Cardiff, United Kingdom,
5Primary Care Medical Group, University of Southampton Medical School, Southampton, United Kingdom,
6Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, Netherlands,
7General Practice Research Unit, Institute of Community Medicine, University of Tromso, Tromso, United Kingdom,
8Laboratory of Medical Microbiology, Vaccine & Infectious Disease Institute (Vaxinfectio), University of Antwerp, Antwerp, Belgium