1. Unit of Global Health, Department of Health Science, University Medical Centre Groningen, Groningen, the Netherlands
2. Fair Medicine Foundation, Amsterdam, the Netherlands
3. Faculty of Management Sciences, Open University, Heerlen, the Netherlands
4. Unit of PharmacoTherapy, -epidemiology & -economics (Pte2), Department of Pharmacy, University of Groningen, Groningen, the Netherlands
5. Faculty of Economics & Business, Department of Economics, Econometrics & Finance, University of Groningen, Groningen, the Netherlands