In Leonard v. Workmen's Compensation Appeal Board, 61 Pa. Commw. 200, 433 A.2d 572 (Pa. Cmwlth. 1981), a widow filed a fatal claim petition asserting that her husband's heart disease and fatal heart attack were work-related, which was supported by expert medical opinion. The employer did not present any medical evidence, but argued that the claimant's medical evidence was incompetent because her medical expert had not seen the decedent within two years before his death. The Court held that the timeliness of the examination went to the weight and credibility of the testimony, not its competency.