Funding for this research was provided by:
National Institute of Environmental Health Sciences (1R01ES020360-01)
Canada Research Chairs
Text and Data Mining valid from 2019-06-14
Received: 22 December 2018
Accepted: 4 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Boards at the University of California, Berkeley and the University of Pretoria in South Africa. All participants provided verbal informed consent for participation.
: No identifiable data were collected and no individuals’ data is presented, so consent for publication was not needed.
: The authors declare that they have no competing interests.