Dear GRELL members, Dear presenters, Dear attendees,

The GRELL 2021 organizing team would like to warmly thank you for your participation, support and exchanges made during the 45th annual GRELL meeting. Hosted for the first time by Luxembourg, it was also the first 100% virtual GRELL meeting. Proudly, this meeting welcomed around 200 live attendees per day, joining the conference from 20 nations.

In particular, we would like to thank all presenters who accepted our invitations despite very busy time schedules and the virtual format of the event imposing new technical constraints. Thank you for your professionalism and your involvement. Without you, this meeting would not have been possible.

We would also like to thank our contributors. Without their financial support, we would not have been able to organise this event. We would like to highlight the financial support of the Luxembourg National Research Fund (FNR) through the RESCOM: Scientific Events funding program, the Health Directorate of the Luxembourg Ministry of Health, the Fondation Cancer, the Fondatioun Kriibskrank Kanner, the Societé Luxembourgeoise d’Oncologie and the National Cancer Institute.

Finally, we would like to thank the entire team of the National Cancer Registry of Luxembourg (RNC) and of the Luxembourg Institute of Health (LIH) for the excellent organisation of this virtual event (LIH press release). It was a genuine challenge and now we can conclude that the "Mission is possible", thanks to you all.

We hope to meet you in person in Spain next year and remain,

With best wishes from Luxembourg !