#1. Structure, organization, functioning |
 ✓ How frequently are you in contact with other TNO members? How often does the TNO meet as a group?  ✓ Can you describe the organizational structure of the TNO: is it rather hierarchically or horizontally organized?  ✓ Do you know whom to turn to in difficult situations? Have you already made use of this knowledge?  ✓ Could you describe how decisions are made within the trauma network? Are the decision-making processes usually collective, are they transparent?  ✓ What role does the leader of the TNO play in the network’s structure? |
#2. Climate, reciprocity, trust |
 ✓ Do you trust the other TNO members?  ✓ In the group of TNO members, are you supportive of each other? Have you already done a favor to other TNO members, and vice versa? Is there something like solidarity within the TNO?  ✓ Can you speak openly about problems? Are dissenting contributions and discussions valued? |
#3. Social identity |
 ✓ Do you have ideas and perspectives similar to other TNO members?  ✓ Are you pursuing the same goals? |
#4. Resources & benefits 1: Knowledge resources: Knowing each other |
 ✓ By being part of the Trauma Network Eastern Bavaria (TNO), do you know more trauma surgeons from other hospitals than before?  ✓ Does the TNO help you appraise your colleagues’ expertise and their personal qualities better? |
#5. Resources & benefits 2: Facilitation of interactions, collective activities, advocacy, power |
 ✓ How has participating in the trauma network changed the co-operation with the other TNO hospitals? (prompts: communication, consultation, training, patient transfers)  ✓ Are you able to influence certain events with the support of the other TNO members? E.g. influence policy makers?  ✓ Have you already been involved in common activities of the TNO? Have you jointly advocated for your interests?  ✓ Were you able to achieve a goal by collectively getting active? |
#6. Resources & benefits 3: Outcomes on patient care and work satisfaction |
 ✓ In your opinion, does the cooperation in the TNO influence the quality of patient care?  ✓ In your opinion, has the cooperation in the TNO an effect on your hospital’s success?  ✓ Has being part of the TNO influenced your motivation to work? |