Acknowledgements
We are indebted to our volunteers, and thankful to the team at the Centre for Human Drug Research and the pharmacy of the Leiden University Medical Center. Thanks to Karen Broekhuizen, medical writer at the Centre for Human Drug Research, who edited the manuscript for clarity.
Conflict of interest
Wim Jiskoot is a scientific advisor at Coriolis Pharma, Martinsried. Theo Rispens received fees for lectures from Pfizer, AbbVie, and Regeneron, and a research grant from Genmab. Koen van der Maaden is scientific advisor of MyLife Technologies B.V. and co-founder of uPRAX microsolutions B.V. The other authors have declared no conflict of interest exists.