Tang, Weixin
Hu, Johnny H.
Liu, David R.
Article History
Received: 31 October 2016
Accepted: 12 May 2017
First Online: 28 June 2017
Competing interests
: The authors have filed a patent application on aspects of this work. D.R.L. is a consultant and co-founder of Editas Medicine, a company that seeks to develop genome-editing therapeutics.