Acknowledgments
The authors thank the patients and families who participated in this study for their generosity and support, as well as all the nurses, patient coordinators, physicians and staff at Stanford University Medical Center who made this work possible. The authors acknowledge Allison Jacob and Lanny Kirsch at Adaptive Biotechnologies for providing Supplemental Figure 2.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org/10.1080/10428194.2018.1474463.