Key Inclusion Criteria:

Signed informed consent from both parents or legal guardian(s) prior to patient participation in the study.

Paediatric liver transplant recipients aged greater than or equal to 1 month and younger than 18 years of age.

Paediatric recipients at the earliest 1 month and latest 6 month after liver transplantation.

Key Exclusion Criteria:

Patients with hepato-biliary malignancies and/or patients transplanted due to fulminant hepatitis /acute liver failure.

Presence of thrombosis of any major hepatic arteries, major/reconstructed hepatic veins, portal vein or inferior vena cava at any time prior to the start of study drug.

Patients with serum creatinine value >2 times age-related ULN at Baseline or who received renal replacement therapy within one week prior to the start of study drug and patients with a confirmed spot urine protein/creatinine ratio indicating a urinary protein excretion >500 mg/m2/24 hrs, at Baseline.

Patients with clinically significant systemic infection and/or in a critical care setting requiring life support measures such as mechanical ventilation, dialysis, or vasopressor agents.

Patients with a known hypersensitivity to the drugs used on study or their class, or to any of the excipients.

Pregnant or nursing (lactating) female patients, where pregnancy is defined as the state of a female after conception and until the termination of gestation, confirmed by a positive βHCG laboratory test (>9 mIU/mL) at Baseline.

Female patients of child-bearing potential, defined as all women physiologically capable of becoming pregnant, UNLESS they agree for abstinence from sexual activity.