The effects of long-term melatonin treatment on plasma liver enzymes levels and plasma concentrations of lipids and melatonin in patients with nonalcoholic steatohepatitis: A pilot study - Gonciarz, M; Gonciarz, Z; Bielanski, W; Mularczyk, A; Konturek, P C; Brzozowski, T; Konturek, S J (J Physiol Pharmacol, 2012)