Fig. 1

Structured data collection path way (FU = follow-up, RT = radiation therapy): Physicians reported clinical data (e.g., symptoms before RT, RT concept, acute toxicites) at the first consultation, after the start and completion of RT and for each FU. After completion of RT treatment, FU manager added a care path in ARIA and documented baseline information in ARIA and REDCap. For the repeated internal (clinical and telemedicine) as well as external FUs, appointments were scheduled and performed according to the FU reports. FU manager checked all documentation and documented the completion of care paths tasks