Dear Study Teams, Due to scheduled maintenance, no registration or randomization confirmations will be sent via email on September 16, 2026, from 3:00 p.m. to approximately 7:00 p.m. Registrations and randomizations can still be carried out as usual; the results will be visible directly in the user interface. The automatic confirmation emails will be sent retroactively once the maintenance work is complete. Thank you for your understanding. The ZKS Leipzig Team