Social network graphs are pretty, but they’re not the only way we can try to visualized cross-institutional research collaborations. Here’s a geographic view of some of the institutions that UCSF dentistry researchers have co-authored with over the course of 2013.
Method: I searched Web of Science for dentistry-related articles published in 2013 (i.e. from January 1-December 5, 2013). I began by running a search for any articles published in 2013 matching a number of dentistry-related keywords (dental, dentistry, electrogalvanism, endodontics, jaw relation record, mouth rehabilitation, odontometry, oral, orthodontics, periodontics, prosthodontics, teeth, tooth), then filtered only those that matched the “DENTISTRY ORAL SURGERY MEDICINE” Web of Science category. I pulled out institution names, tried to geolocate them using the OpenStreetMap Nominatim service, and used Google Fusion Maps to put them on a map. This map is by no means authoritative, given that a significant number of institutions could not be trivially geolocated.
BioMed 2.0 
I think it will be interesting to present this along with a graph of total publications across the globe. We can then infer if the rest of world is just not publishing at all (likely because its mostly the developing world) or if researchers in developed countries prefer to collaborate with researchers from other developed/English speaking countries.