(November 15, 2023, 2:27 PM EST) -- CINCINNATI — A federal judge overseeing the opioid multidistrict litigation did not abuse his discretion in refusing to disqualify the special master, who is accused of bias after he inadvertently sent a personal email to the parties, the Sixth Circuit U.S. Court of Appeals held Nov. 14, denying a petition for a writ of mandamus filed by two pharmacy benefit managers (PBMs)....