Funding for this research was provided by:
National Science Foundation (NNCI-1541959)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD055148)
National Institute of Allergy and Infectious Diseases (DP2AI112219, R01AI102907)
Received: 18 December 2018
Accepted: 23 April 2019
First Online: 16 May 2019
: The authors declare no competing interests.