Dosing simulations depicting the increases in norepinephrine concentration and haemodynamic responses as a function of infusion rate in children of different bodyweights and ages for patients with a number of organ dysfunctions ≤3 or ≥4, respectively. Body weight (kg): 3, age (months): 0.462; body weight (kg): 10, age (months): 12; body weight (kg): 20, age (months): 72; body weight (kg): 40, age (months): 144; body weight (kg): 70, age (months): 300