nourisson (1) puits (1) norme (1) échantillonnage (1) épuration (1) maladie (1) investigation (1) âge (1) enfant (1) procès (1) Handling (1) Testing (1) Children (1) Specimens (1) Reverse transcriptase (1) Polymerase chain reaction (1) Specimens (1) Rates (1) Testing (1) Symptoms (1) Sampling (1) Saliva (1) Performance (1) Patients (1) Human beings (1) Examinations (1) Days (1) Confidence (1) Children (1) Age (1)