Liesbeth Boersma, MD is radiation oncologist at Dept. Radiation Oncology making and innovation implementation. She is member of the Dutch (Maastro), GROW-School for Oncology and Reproduction, Maastricht University Medical Centre, Maastricht, The Netherlands, and professor at the University of Maastricht, The Netherlands. Her fields of interest include radiotherapy for breast cancer, shared decision Committee for Breast Cancer Guidelines, (co-) PI of several studies, and member of the Dutch Breast Cancer Research Group (BOOG) Locoregional Treatment. She is chair of the Dutch Platform for Proton Therapy. In addition, she is faculty member of the ESTRO course multidisciplinary treatment of breast cancer, and of the ESTRO-(ACROP) guideline committee, breast cancer subgroup.