Task: Answer Verification
Input (English): Question: Do the long-term effects of modified electrode surfaces and intracochlear corticosteroids on postoperative impedances in cochlear implant patients?
Answer: Although the differences between control and steroid-treated groups decrease with time, single intraoperative intracochlear steroid deposition was proven to lower postoperative impedances during first 3 to 4 years after implantation probably because of reduction of fibrous tissue growth.
Output (English): yes