International collaboration

International cooperation: The interaction of persons or groups of persons representing various nations in the pursuit of a common goal or interest.

https://meshb.nlm.nih.gov/record/ui?name=International%20Cooperation

Also, congresses as topic

Congresses as topic: Works about conferences, conventions or formal meetings usually attended by delegates representing a special field of interest.

https://meshb.nlm.nih.gov/record/ui?ui=D003226

Also, conferences, conferences and congresses, conferences and proceedings, congresses and conferences, professional meetings and conferences