How have the courts dealt with a request for a supplemental brief in a personal injury appeal?

Counsel filed an opening brief setting forth the facts of the case and asks us to review the record and determine whether there are any arguable issues on appeal. (People v. Wende, supra, 25 Cal.3d 436.) Defendant was advised of his right to file a supplemental brief within 30 days of the date of filing of the opening brief. More than 30 days have elapsed, and we have received no communication from defendant.

Having examined the record, we find no arguable error that would result in a disposition more favorable to defendant.