1. 1 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
2. 2 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
3. 3 Numedicus Ltd., Cambridge, United Kingdom
4. 4 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
5. 5 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands; and Department of Anesthesiology, Noordwest Ziekenhuisgroep, Alkmaar, The Netherlands
6. 6 AMO Pharma Ltd., Leeds, United Kingdom
7. 7 AMO Pharma Ltd., Leeds, United Kingdom
8. 8 AMO Pharma Ltd., Leeds, United Kingdom
9. 9 AMO Pharma Ltd., Leeds, United Kingdom
10. 10 AMO Pharma Ltd., Leeds, United Kingdom
11. 11 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
12. 12 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
13. 13 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands
14. 14 Department of Anesthesiology, Leiden University Medical Center, Leiden, The Netherlands; and PainLess Foundation, Leiden, The Netherlands