If you are participating in the conference in an invited role (eg, Abstract Author, Program Committee, Invited Speaker, etc), you are preapproved to register. Please use the same email address provided (eg, where you received your preapproved email notification or what was provided in the abstract submission system) to avoid having to go through the application process. If you are unsure of the email address we have on record for you, please email CROIregistration@iasusa.org for assistance.