HARRISBURG, Pa. - Merely demonstrating asbestos exposure does not entitled a colon cancer claimant to the presumption of causation under the state's workers' compensation statutes, a Pennsylvania court held March 13 (Diana Moretti and John Moretti, dec'd v. Workers' Compensation Appeal Board (Kimberly Clark Corp., No. 1452 C.D. 2013, Pa. Cmwlth.; 2014 Pa. Commw. Unpub. LEXIS 167).