487 A.2d 66 Edward Milton Lersch, Petitioner v. Workmen’s Compensation Appeal Board (City of Pittsburgh), Respondents. Commonwealth Court of Pennsylvania. January 29, 1985. Workmen’s compensation — Causal connection — Burden of proof — Medical testimony — Scope of appellate review — The Pennsylvania Workmen’s Compensation Act, Act of June 2, 1915, P.L. 736 — Occupational […]