Article History
Accepted: 8 July 2019
First Online: 15 August 2019
Competing interests
: R.L., D.W.R. and A.N. are employees and/or founders of the Astellas Institute for Regenerative Medicine, Universal Cells Inc. and panCELLa Inc., respectively, companies in the area of regenerative medicine, including the generation of cell therapies and universal cells.