Funding for this research was provided by:
U.S. Department of Health & Human Services | NIH | National Institute of Allergy and Infectious Diseases (AI64350)
Received: 18 March 2019
Accepted: 14 May 2019
First Online: 2 July 2019
: Y.L., P. Zheng and M.D. have equity interest in OncoImmune, Inc. which provided partial financial support for the study. The remaining authors declare no competing interests.