Wisecarver JL, Earl RA, Haven MC, Timmins PW, Shaw BW, Stratta RJ, Langnas AN, Zetterman RK, Donovan JP, Shaefer MS, et al. Histologic changes in liver allograft biopsies associated with elevated whole blood and tissue cyclosporine concentrations. Mod Pathol. 1992 Nov; 5(6):611-6.