Funding for this research was provided by:
U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (R01GM097261)
U.S. Department of Health & Human Services | NIH | National Cancer Institute (R01CA120954, R01CA197506, P30CA33572)
Received: 11 December 2017
Accepted: 25 May 2018
First Online: 27 June 2018
: The authors declare no competing interests.