Funding for this research was provided by:
Swiss Excellence Scholarship (2015.0858)
North-South Cooperation, University of Zurich (F-42320–71–01)
Béatrice Ederer-Weber Foundation
Received: 15 July 2020
Accepted: 31 August 2020
First Online: 17 September 2020
Ethics approval and consent to participate
: No ethical clearance was required as the data came from published studies.
: Not applicable.
: The authors declare that they have no competing interests.