Please be aware that there are several websites impersonating as the SIOP 2021 registration. They can be very professional looking and may use online advertising to appear at the top of search results.
Registration for SIOP 2021 will be open soon, on the official SIOP 2021 website which you are on now. To receive a notification when registration is open, and any future Congress letter, please subscribe to our newsletter.
We look forward to seeing you at SIOP 2021, from October 21-24, 2021!