Authors: Nanna Brix Finnerup, Nadine Attal, Simon Haroutounian, Ewan D McNicol, Ralf Baron, Robert H. Dworkin, Ian Gilron, Maija Haanpää, Per Hansson, Troels S. Jensen, Peter Kamerman, Karen Lund, Andrew Moore, Srinivasa N. Raja, Andrew S.C. Rice, Michael C. Rowbotham, Emily S. Sena, Philip J. Siddall, Blair H. Smith, Mark S. Wallace - The Lancet 2015 cited by 3,882