The annual report 2021 documents the progress that has been made in the second year of the TANDem project in the context of COVID-19, illustrating the remarkable resilience and ongoing commitment of the TAND Consortium members to the project and its greater goals.

The TANDem consortium presented an abstract at the 24th World Congress of the International Association of Child & Adolescent Psychiatrists and Allied Professions (IACAPAP) organized virtually in December 2020.

An update on the TANDem project was presented at the annual DCAP (Division of Child and Adolescent Psychiatry) research mini-symposium virtually held on 27th November 2020.

At the International TSC Research Symposium organized virtually on 13th November 2020 an update was given on the first year of the TANDem project.

On 9th-11th November 2020 a virtual TANDem Consortium Consensus meeting took place to look back on all the work done in the first year of the project, and to set the goals and focus for the next year.

The first annual report documents the very hard work that has been done in year 1 to get the TANDem project going, encouraged by the dedication and hard work of all TANDem Consortium members, and by the ongoing support and enthusiasm for the project from the global TSC community.

The TANDem project had a launch meeting in November 2019 which took place at the Katholieke Universiteit Leuven (KUL) from 17–19 November 2019. The meeting was coordinated by Stephanie Vanclooster and hosted by Liesbeth De Waele.