Doctoral researchers are supervised by a Thesis Committee (TC) of at least two independent Principle Investigators (PIs) to ensure high standard of supervision. TC meetings and reports are mandatory at 6, 18 and 30 months after the start of the thesis. Doctoral researchers of the GBS are required to attend three courses during their doctoral thesis. Of these courses, at least one has to cover "Transferable Skills" and "Technical skills" respectively. Equivalents are described in the guideline. Additionally each doctoral student is obliged to participate in the online course "Good Scientific Practice". Furthermore, they have to participate in twelve talks (Checklist) and present a poster at the GBS Poster Session at least once.