Mealey's (October 26, 2015, 2:17 PM EDT) -- PHILADELPHIA — “Cumulative exposure” testimony differs from “any exposure” testimony, and two experts may testify about asbestos’ role in renal cancer but not specific causation, the federal judge overseeing the asbestos multidistrict litigation held Oct. 23 (Leroy J. Mortimer and Cheryl Mortimer v. A.O. Smith Corp., et al., No. MDL 875, 13-4169, E.D. Pa.)....