Dear Researchers,

Due to the current high volume of registration review requests, and in order to prioritize the timely processing of prospective registrations and encourage the good scientific practice of "register first, then conduct the study", retrospective registration applications will be processed sequentially after all prospective registrations have been completed.

As a result, the review cycle for retrospective registrations is expected to be extended by 15–30 working days compared to the standard registration process.

We strongly recommend that you complete your registration before starting your study to avoid delays in your project timeline.

Thank you for your understanding and cooperation.