Pharmacokinetic modeling of R and S‐Methadone and their metabolites to study the effects of various covariates in post‐operative children oleh Blessed W. Aruldhas, Sara K. Quinney, Brian R. Overholser, Michael A. Heathman, Andrea R. Masters, Reynold C. Ly, Hongyu Gao, Senthil Packiasabapathy, Senthilkumar Sadhasivam