How have appointed counsel dealt with the issue of appointed counsel filing an opening brief in a personal injury case?

Appointed counsel filed an opening brief setting forth the facts of the case and asking this court 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 by counsel of the right to file a supplemental brief within 30 days of the date of filing the opening brief. More than 30 days elapsed and defendant did not file a supplemental brief.