Article History
Accepted: 7 November 2019
First Online: 6 January 2020
Competing interests
: D.C. has received patent royalties from Juno Therapeutics (a Celgene company), Unum Therapeutics, Nkarta Therapeutics and Medisix Therapeutics; he is a co-founder of, stockholder of and consultant for Unum, Nkarta and Medisix. N.S. and D.C. are co-inventors on patent applications licensed to Nkarta or unlicensed. A.J. has no financial competing interests. None of the authors has non-financial competing interests.