The registration for online participation is extended til April 15 (however, payment by credit card is possible only til April 1). If you haven‘t received a confirmation regarding your abstract within the period from December 12 2020 til March 12, 2021, please contact us (it may be in your spam folder). As the conference approaches and if the health situation permits it, the registered participants will be able to convert their participation to the onsite mode (the conference will then run in the hybrid: online +onsite form).