“…Four out of seven studies were conducted in patients who underwent liver transplantation, mostly due to end-stage liver cirrhosis (O'grady et al, 2002;The US Multicenter FK 506 Liver Study Group, 1994;Margaritet al, 2005;Moench et al, 2007) while three studies involved renal transplant recipients due to end-stage renal disease (Mayer et al, 1997;Margreiter et al, 2002;Murphy et al, 2003). Five trials were conducted for twelve months (Mayer et al, 1997;Murphy et al, 2003;O'grady et al, 2002; The US Multicenter FK 506 Liver Study Group, 1994;Moench et al, 2007), one trial was conducted for five years (Margarit et al, 2005) and another one trial was conducted for six months (Margreiter et al, 2002).…”