CHICAGO - An Illinois federal judge on April 30 excluded a plaintiff expert's opinion that a jury should award up to $21.3 billion in punitive damages in a Prempro trial and ordered a hearing on how the expert arrived at his determination of defendant Wyeth's net worth (Joe Belle Baldonado v. Wyeth, et al., No. 04-4312, N.D. Ill., E. Div.; 2012 U.S. Dist. LEXIS 59512).