What rights does a defendant have when he is excluded from an in camera proceeding?

Defendant contends these rights were violated by his exclusion from an in camera proceeding during voir dire at which the prosecutor and defense counsel passed for cause and each exercised three peremptory challenges. Even if his exclusion was error, he fails to show prejudice. (People v. Bradford (1997) 15 Cal.4th 1229, 1357, 65 Cal.Rptr.2d 145, 939 P.2d 259 ["Defendant has the burden of demonstrating that his absence prejudiced his case or denied him a fair trial"].)