Indeed, the disease has several stages. Generally, the patients who are good candidates for that procedure are those whose disease is relatively advanced, but not too much so. Good candidates are those in whom we observe a lot of fluctuations. As you know, most patients are treated with medications and experience fluctuations. When they take the medication, they feel well, but the effect does not last long enough.
The stimulation allows us to reduce the doses and to even out the symptoms. But you cannot wait too long. The problem is that the number of patients who could benefit from this treatment is disproportionate compared to the availability of the treatment. At the Neurological Institute, we treat approximately 100 patients a year, but there are 400 or 500 patients who would be good candidates. Unfortunately, access to that treatment is insufficient.