Acknowledgements
We thank D. Schindler, E. Scherer and S. Kostadinova for diligent and excellent assistance with data collection and leukapheresis execution. This work was supported by an educational grant from Sanofi-Aventis.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org/10.1080/10428194.2017.1393673.