1 Department of Medical Microbiology, University of Groningen, Groningen 9713 AV, Netherlands.
2 Department of Health Sciences, University of Groningen, Groningen 9713 AV, Netherlands; Department of Pharmaceutics, School of Pharmacy, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia.
3 Department of Health Sciences, University of Groningen, Groningen 9713 AV, Netherlands; University Medical Center Groningen, Department of Economics, Econometrics and Finance, Faculty of Economics & Business, University of Groningen, Groningen 9713 AV, Netherlands.
4 University Medical Center Groningen, Department of Economics, Econometrics and Finance, Faculty of Economics & Business, University of Groningen, Groningen 9713 AV, Netherlands; Unit of PharmacoTherapy, Epidemiology and Economics, Department of Pharmacy, University of Groningen, Groningen 9713 AV, Netherlands; Department of Pharmacology and Therapy, Airlangga University, Surabaya, Indonesia. Electronic address: m.j.postma@rug.nl.