Paired statistical tests for continuous data (A, f, PW, number of consultations,) and for ordinal data (Y‐BOCS, GAF, HAM‐A, HAM‐D, BDI) pre‐ and post‐implantation, as well as descriptive statistics for continuous data (number of recharging sessions, number of battery status controls, battery longevity, preferred stimulator type at replacement), will be used. No power calculation is performed.