Table 1 Distribution of the studies included in the review across the OECD countries
OECD country | Number of studies included in this review |
|---|---|
Not specified/across continents | 19 |
Across Europe | 2 |
Belgium | 1 |
Canada | 1 |
Mexico | 1 |
The Netherlands | 7 |
Puerto Rico (the unincorporated territory of the US) | 1 |
Switzerland | 2 |
Turkey | 1 |
The US | 42 |
Total number of articles | 77 |