Table 1.

The 10 countries and institutions with the highest volume of collaborative publications.

Rank	Country/region	Count	BC	Year	Rank	Institution	Count	BC	Year
1	USA	462	1.03	2002	1	Duke University	30	0.02	2002
2	People's R China	290	0.80	2008	2	Chinese Academy of Sciences	23	0.07	2008
3	South Korea	69	0.05	2010	3	University of Milan	18	0.00	2003
4	Italy	62	0.05	2008	4	York University	17	0.00	2003
5	Japan	55	0.16	2007	5	University of Arizona	17	0.00	2007
6	Spain	51	0.62	2007	6	Xi'an Jiaotong University	17	0.04	2010
7	Canada	48	0.00	2008	7	University of California, San Diego	14	0.07	2012
8	France	48	0.35	2007	8	Fudan University	14	0.03	2014
9	India	44	0.00	2009	9	The Medical University of South Carolina	14	0.00	2007
10	Germany	42	0.25	2008	10	Istituto Auxologico Italiano	13	0.00	2003