Schmidt-Traub, Guido https://orcid.org/0000-0002-3946-5230
Kroll, Christian https://orcid.org/0000-0001-9954-6123
Teksoz, Katerina
Durand-Delacre, David https://orcid.org/0000-0001-8847-6174
Sachs, Jeffrey D.
Article History
Received: 23 January 2017
Accepted: 8 June 2017
First Online: 17 July 2017
Change Date: 31 July 2017
Change Type: Erratum
Change Details: In the version of this Perspective originally published, we did not credit the United Nations for the image icons in Figure 1. This has been corrected online 31 July 2017.
Competing interests
: The authors declare no competing financial interests.