Ashish Jha1, Ilona Kickbusch2, Peter Taylor3, Kamran Abbasi4. 1. Harvard Global Health Institute, Cambridge, MA 02138, USA ajha@hsph.harvard.edu. 2. Graduate Institute, Geneva, Switzerland. 3. Think Tank Initiative, International Development Research Centre, Ottawa, Ontario, Canada. 4. The BMJ, London WC1H 9JR, UK.