Acknowledgments
We would like to thank the patients and their families for their participation in this clinical study. We would like to thank Katherine Yang and Benedetto Farsaci for providing receptor occupancy data, and Payal Parikh-Patel, Mihaela Popa McKiver and Brian Lestini of Bristol-Myers Squibb for their critical review of the manuscript.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org/10.1080/10428194.2017.1320713.