As an author of a research article that appears in this issue,1 I wish to respond to the related commentary by Stewart-Brown.2 An encrypted identity-protecting coding procedure was thoroughly reviewed by Commission d’accèss à l’in-formation du Québec before it permitted release of Medicare records for research purposes. Analyses were done on entirely denominalized data (no names attached). Every measure was taken to respect the confidentiality of the participants, and all procedures were reviewed by the Concordia University Institutional Review Board for conformity with ethical requirements for research. Our procedures are designed to correspond to the highest international standards for protecting confidentiality of participants. Ethical guidelines for parental consent have changed dramatically in the 30 years since the Concordia Project’s inception, and the “opt-out” approach to consent would no longer be considered sufficient in Canada. However, the data were entirely confidential and protected the privacy of participants.