Primary data
The paper questionnaires will be scanned using the Electric Paper TeleForm software, in which they are subjected to detailed plausibility tests. The primary data will be analysed using descriptive statistics, tests for mean differences in independent samples and multivariable multilevel analyses to combine GP practice-level data from the online survey with individual patient survey data. All individual interviews will be audio-recorded and then transcribed and pseudonymised. The transcripts will be analysed with the structuring qualitative content analysis according to Kuckartz [