“…This pilot study received approval from the Human Research Ethics Committee (Hospital de Clínicas de Porto Alegre protocol 17‐0337). This study used saliva samples collected in a previous study (Curra et al, 2022). Saliva samples from 11 HSCT recipients were collected on days: D − 5 (T1; onset of conditioning), D + 3 (T2; onset of neutropenia), D + 8 (T3; peak immunosuppression), D + 15 (T4; recovery of marrow for autologous HSCT), and D + 21 (T5; recovery of marrow for allogeneic HSCT).…”