(January 26, 2016, 2:21 PM EST) -- CHICAGO — The judge overseeing the Zimmer NexGen Knee multidistrict litigation on Jan. 22 said she will pick four additional bellwether trials — with two set for trial Oct. 1 and Nov. 23 — and that mediation will take place from December to January after the last trial (In Re: Zimmer NexGen Knee Implant Products Liability Litigation, MDL Docket No. 2271, No. 11-5468, N.D. Ill., Eastern Div.)....