Fig. 1

a Collaboration network. Please select those people with whom you are currently collaborating on a TRN activity, event or project. By “collaboration” we mean formally (e.g. on a funded project) or informally (e.g. have discussed aspects of research, supplied expertise, advice or equipment to others). b Collaboration network. Only showing ties of people who knew each other before the network started. Coloured by self-title. c Collaboration network: only showing ties of people who did not know each other before the network started. Coloured by self-title