%0 Journal Article %T WHO Regional Office for Europe’s Natural Experiment Studies Project: an introduction to the series %A Snell, Andrew %A Reeves, Aaron %A Rieger, Matthias %A Galea, Gauden %A Mauer-Stender, Kristina %A Mikkelsen, Bente %A Stuckler, David %J European Journal of Public Health %V 28 %N suppl_2 %P 1-3 %@ 1101-1262 %D 2018-10-01 %I Oxford University Press %~ DeepDyve