“…[6][7][8][9][10][11][12][13][14][15] However, tacrolimus has a narrow therapeutic window and displays considerable interindividual and intra-individual variabilities in its pharmacokinetics, with poor correlation between drug dosage and blood concentrations, making it difficult to define an optimal dose schedule. 18 Currently, different tacrolimus PPK models have been set up for various populations including renal transplant patients, [19][20][21][22][23][24] liver transplant patients, [25][26][27][28][29][30] haematopoietic stem cell transplant patients 31 and lung transplant patients. Moreover, the population analysis methodology differentiates between interindividual variability and residual unexplained variability.…”