Out of 11,000 nearly 1,000 international delegates representing over 50 nations are expected to the congress. Pre-registration is operated online until 15 October 2017. Inside Europe, tickets and vouchers will be posted previously to the congress to prevent queuing on-site. The congress office opens for on-site registration on Monday, 23 October 2017. Please calculate waiting at peak times! An overview of the admission fees are available here.