ACKNOWLEDGMENTS
pain
The authors thank Matthew Howard from King’s College London for lending their hand-piece for applying pressure pain to the thumb nail. Also, the authors thank Elio Sjak-Shie, Evert Dekker, and the technical support team of Leiden University (SOLO) for their support in implementing the pressure pain device. Lastly, the authors thank all student assistants involved in data collection for their immense help.M.K., and S.M. contributed equally to this manuscript and share first authorship.This study was funded by a VICI grant from the Dutch Research Council (NWO; grant number 45316004), awarded to A.W.M. Evers. The remaining authors have no conflicts of interest to declare.