Implanted medical device products liability cases, such as this one, "involvef] complex, highly technical analysis” which require significant expert testimony to show causation. Greger v. C.R. Bard., Inc., 2021 WL 4502617 at *7 (E.D. Tex. Sept. 30, 2021). When a plaintiff fails to designate expert witnesses sufficient to show defendant's conduct was the cause of plaintiff's injuries in a medical malpractice or products liability case, the plaintiff “will be unable to bear the burden of proof at trial.”