“…They also shared beds with preschool children during chemotherapy. Six hours after the first administration, the concentration of CPM in the urine and saliva of attending caregivers, nurses, doctors, and nursery teachers who worked in the hospital, child‐life specialists, and housekeeping staff members in the ward was measured using modified liquid chromatography/mass spectrometry (LC/MS/MS; Shionogi Analysis Centre Co., Ltd., Osaka, Japan) 6,7 . The current protocol has improved the sensitivity and specificity.…”