S.E. reports consultancy fees from Medtronic, and Mainstay Medical outside the submitted work. He has received department research funding from the National Institute of Health Research, Saluda Medical and Medtronic. S.N. reports consultancy fees from Saluda Medical. A.B.: MTech Access was commissioned by Saluda Medical to participate in this project. N.A.M. reports receiving grants from Neuros, Mesoblast, and Vivex Biologics, as well as consulting as a medical monitor for Saluda Medical, Nevro, Vivex Biologics, Mainstay, Sollis Therapeutics, and Vertos outside the submitted work. C.G. reports consulting fees and stock options received from Mainstay, personal fees from Mainstay, Saluda Medical, Persica, and Iliad outside the submitted work, research funded by Sollis, expert witness testimony fees, and serves as Editor-in-Chief of Pain Practice. B.B. reports an educational grant from Saluda Medical and consultancy fees from Salvia Bioelectronics, Medtronic and Abbott outside the submitted work. P.S.S. has received consultancy fees from Medtronic, Saluda Medical, Nalu, and Biotronic outside the submitted work, and has stock options from Saluda Medical and Nalu. N.S., A.L., and R.V.D. are employees of Saluda Medical. R.V.D. has previously received consultancy fees from Mainstay Medical, Medtronic, and Saluda Medical outside the submitted work. The remaining author declares no conflict of interest.