Inclusion Criteria patients:  Women Older than 18 years Speaking, understanding and writing Dutch fluently Mentally competent Recently underwent a operation for breast cancer (invasive or in situ) Takes AET for maximum two months Consultation planned within 4-5 month Home access of a computer with internet connection  Exclusion Criteria patients:  Different treatments regimes (e.g. adjuvant trial or a combination with cycline-dependent kinase (CDK) 4/6-inhibitors) Metastatic disease  Inclusion Criteria health care professionals:  Contact with patient(s) included in the trial  Exclusion Criteria health care professionals:  Included in panels Member of the research team