402 A.2d 293 James O. Sacks and Harleysville Mutual Insurance Company, Petitioners v. Commonwealth of Pennsylvania, Workmen’s Compensation Appeal Board and William H. Sacks, Respondents. Commonwealth Court of Pennsylvania.Argued March 8, 1979 June 6, 1979. Workmen’s compensation — Medical testimony — Causation — Burden of proof — Immediate disabling pain. 1. In a workmen’s compensation […]