342 A.2d 442 Workmen’s Compensation Appeal Board of the Commonwealth of Pennsylvania and Smittie J. Brown v. Neville Chemical Company and American Mutual Insurance Companies, Insurance Carrier, Appellants. Commonwealth Court of Pennsylvania.Argued May 9, 1975 July 25, 1975. Workmen’s compensation — Medical services — Reimbursement of medical expenses — Designation of physicians — Authorization — […]