Who will be blinded {17a}
The members of the unblinded study team (nurse anesthesiologist or research nurse) will be responsible for the compounding of premedication for study participants. Investigators and site staff performing the sedation and assessments during the pre-sedation and the post-sedation periods will be blinded: the premedication will be administered by a blinded member of the nursing staff who takes charge of the patient in the one-day clinic. The sedation will be carried out by an anesthesiologist, who will be blinded to the premedication received by the child.The patient will also be blinded, using the double dummy technique.