Contact the HIE study team To learn more about our study, please contact us to speak with a research study team member. Phone: 617-355-1651Email: hydrogenHIEstudy@childrens.harvard.edu Participant opt out form Please complete and submit the following form if you wish to opt your child out of participating in the HIE study. If you change your mind at any time, please contact us by phone or email to opt back in. You must have JavaScript enabled to use this form. First Name Last Name Email Address Phone Number Opt out of participating in the HIE Study