Splanchnic balance of free fatty acids, endocannabinoids, and lipids in subjects with nonalcoholic fatty liver disease by Westerbacka, J, Kotronen, A, Fielding, B, Wahren, J, Hodson, L, Perttil, J, Seppnenlaakso, T, Suortti, T, Arola, J, Hultcrantz, R, Castillo, S, Olkkonen, V, Frayn, K, Orei, M, Ykijrvinen, H