Funding for this research was provided by:
Danish International Development Agency (2015-18427/1278912)
Text and Data Mining valid from 2018-08-28
Received: 28 May 2018
Accepted: 17 July 2018
First Online: 28 August 2018
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.