Effectiveness and Cost-effectiveness of a Pre-emptive Genotyping Strategy in Patients Receiving Tacrolimus

Inclusion Criteria: 1. Participants must be willing and able to provide written informed consent prior the initiation of any study procedures. 2. Subject or their legally authorized representative has voluntarily signed the informed consent document. 3. Participant is on the waiting list for a kidney transplant. 4. Subject is able and willing to take part and be followed-up for the majority of the study duration, and adhere to the procedures specified in this protocol. 5. Subjects must be naïve to any genotyping test of the following genes: CYP3A5. Exclusion Criteria: 1. Known hypersensitivity/allergy reaction to tacrolimus or any of the excipients. 2. History of renal, heart, and/or liver transplant. 3. History or clinical evidence of any disease and/or existence of any surgical or medical condition, which might interfere in a relevant manner with the absorption, distribution, metabolism, or excretion of the study treatment, except for renal disease. 4. Any condition or situation precluding or interfering the compliance with the protocol. 5. Any condition at medical discretion for which renal transplantation and/or study treatment should not be received.