- Speaker in the field of Methods in the German Network of Evidence Based Medicine
- Member in the Steering Group Living Evidence Network
- Leader and Senior Editor in the Cochrane Cancer Network, Member in the Editorial Board Cochrane
- Member in the German Society of Haematology und Oncology
- Member in the Professional Group Oncology in the German Network for Health Care Sciences
- Member in the Implementation of Prognosis Group Cochrane
- Member in the Scientific Committee Cochrane
- Leader in the GRADE Time to Event Project Group; GRADE Working Group Canada