Mealey's (February 5, 2020, 9:57 AM EST) -- CINCINNATI — Six pharmacy chains on Jan. 22 filed a petition for a writ of mandamus in the Sixth Circuit U.S. Court of Appeals that seeks to block the opioid multidistrict litigation court from forcing them to disclose “transaction level” prescription order data (In Re: CVS Pharmacy, Inc., No. 20-3075, 6th Cir.)....