Funding for this research was provided by:
National Institute of General Medical Sciences (GM083107, GM116960, GM070449)
National Institute of Allergy and Infectious Diseases (AI134678)
Division of Biological Infrastructure (DBI1564756)
Received: 21 February 2019
Accepted: 30 May 2019
First Online: 7 June 2019
: The authors declare that they have no competing interests.