1. UCL Institute of Education, University College London, London WC1H 0AL, UK
2. EuroHealthNet, Brussels, Belgium
3. University of Klagenfurt, Klagenfurt am Woerthersee, Austria
4. Oxford Martin School, University of Oxford, Oxford OX1 3BD, UK
5. Heidelberg Institute of Global Health, University of Heidelberg, 672 69120 Heidelberg, Germany