Table 2. Top 15 collaborating relationships, T2DM related items, 1951–2012.

Rank	Country 1	Country 2	Published items
1	United Kingdom	United States	237
2	Germany	United States	167
3	Canada	United States	165
4	Italy	United States	159
5	France	United States	119
6	Germany	United Kingdom	110
7	Sweden	United States	106
8	France	United Kingdom	105
9	Japan	United States	101
10	Netherlands	United States	100
11	Australia	United States	93
11	China	United States	93
12	Australia	United Kingdom	92
13	Italy	United Kingdom	87
14	Denmark	United States	83
15	Switzerland	United States	76