Table 1.

Topic list interviews

Topic	Sub topics
Use of the MiLES intervention	Use of the intervention in general Reasons (not) to use intervention When and where the intervention has been used Barriers to and facilitators for using the intervention (e.g. personal factors, organizational factors or technical issues)
Usefulness of the MiLES intervention	Usefulness of the intervention in general Rationale behind the perceived usefulness Usefulness of parts of the intervention:  Animation homepage  Tips per RTW phase  Communication videos  External blogs and videos concerning the cancer survivor’s perspective  External websites concerning privacy, external expertise, and laws and regulations  Conversation checklists Suggestions for improving the usefulness of the intervention
Usefulness in respect of willingness to support	Usefulness in respect of the employer’s willingness to support in general Usefulness in respect of the following “willingness-related” topics:  Perception of the cancer survivor  Perception of most important employer actions Suggestions for improving the usefulness of the intervention in respect of increasing the employer’s willingness to support
Usefulness in respect of ability to support	Usefulness in respect of the employer’s ability to support in general Usefulness in respect of the following “ability-related” topics: Knowledge to support cancer survivors  Skills regarding supporting cancer survivors  Ability to deal with external factors Suggestions for improving the usefulness of the intervention in respect of increasing the employer’s ability to support

All questions were individualized based on the quantitative answers of the participant. For each question, several alternative questions were asked, in order to get in-depth insights into the topics and sub topics concerned