Inclusion Criteria:  Men and women, age ≥ 18 years old at the time of transplantation. Patients receiving a living or deceased donor kidney allograft. Patients transplanted at least 3 months before inclusion. Patients who signed the informed consent form and are willing to comply with study procedures.  Exclusion Criteria:  Combined transplant (i.e. heart-kidney, liver-kidney). Patients who are unable or unwilling to comply with study procedures. Vulnerable patients (minors, protected adults, legally detained). Patients participating in other interventional studies.