“…For liver transplant recipients, the target trough concentration of tacrolimus was 10–15 ng/ml for the first month, 8–10 ng/ml within the first year, 5–8 ng/ml at 1–3 years, 5 ng/ml at 3–5 years, 3–5 ng/ml at 6–10 years, and 2–3 ng/ml after 10 years 24,25 . For kidney transplant recipients, the target trough level for tacrolimus was 6–8 ng/ml during the early postoperative period and was decreased to 3–6 ng/ml after 1 year 26,27 . For heart or lung transplant recipients, tacrolimus was adjusted to a target trough level of 10–15 ng/ml for the initial 6 months after transplantation and 8–12 ng/ml thereafter 28 …”