5-Fluorouracil Whole blood LC/MS Methotrexate Plasma LC/MS Tamoxifen , Endoxifen, 4′-OH-Tamoxifen Plasma LC/MS Irinotecan and 7-Ethyl-10-OH-Camptothecin (SN38) Serum or Plasma LC/MS Anthracycline and Taxanes Serum or Plasma LC/MS
