Funding for this research was provided by:
United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Office (W911NF-15-1-0496, W911NF-18-1-0178)
Fetzer Franklin Fund of the John E Fetzer Memorial Trust
Received: 19 December 2018
Accepted: 8 July 2019
First Online: 1 August 2019
: The authors declare no competing interests.