Fig. 1

Patient view of log-on procedure and questionnaire. Shows the screen view for patients when logging into the system (a) with the study logo (iBLAD) in the top right corner and when completing questionnaires (b). The current and total number of screens is listed at the bottom of the questionnaire, so the patients are aware of their progress. Approximately 10 screens had to be completed in order to complete the full questionnaire, estimated duration 15–30 min depending on pre-existing computer skills. The Ambuflex telephone support number is listed at the bottom in case of difficulty logging in or when completing the questionnaire