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| Country of co-authorship | Country of residence | ||||||
|---|---|---|---|---|---|---|---|
| BEL | CAN | FRA | ITA | ESP | GBR | USA | |
| BEL | 17 | 2 | |||||
| CAN | 10 | 52 | |||||
| ESP | 10 | 8 | 13 | ||||
| FRA | 5 | 7 | 8 | 26 | |||
| GBR | 1 | 105 | 23 | ||||
| ITA | 26 | 8 | 7 | ||||
| MEX | 2 | 2 | 1 | 2 | 168 | ||
| USA | 3 | 3 | 2 | 7 | 3 | 23 | 612 |
