Table 1.

Interview guide.

	Question	Follow-up question
1	What was it like to report in the app? (in general)	Easy/difficult? Advantages/disadvantages?
2	What was it like to report your symptoms?	Easy/difficult? Absence of symptom to report?
		Relevant symptom questions and reporting frequency?
3	Have you used the self-care advice? (yes/no)	If yes, your experience? Relevant self-care advice? Have you used the links?
		If no, have you searched for information elsewhere?
4	How have you experienced that the technology has worked?	The log-in procedure? Mobile coverage?
5	Have you used the graphs to follow your symptom history? (yes/no)	If yes, in which way? How did you experience the graphs?
		If no, why?
6	Were you called sometime by a nurse? (yes/no)	If yes, was it after an alert?
7	How did you experience being called by a nurse after an alert?	—
8	Is there anything else you want to add?	Is there anything in the app that you have lacked?