Data supplements
Appendix 1 Protocol for interviewer (opening and potential follow-up questions).
Appendix 2 Peer knowledge networking group member survey questions.
Appendix 3 R script for permutation test with degree as an example.
Appendix 4 Group member comments on group successes.
Appendix 5 Themes 2 to 6: sub-themes and example quotes related to group challenges and strategies to address them.






