Study sites represented in the literature review.
| Continental area | Countries |
|---|---|
| North America | Canada (3 provinces) |
| United States (11 states) | |
| Central America | Mexico |
| Puerto Rico | |
| South America | Argentina |
| Brazil | |
| Chile | |
| Peru | |
| Uruguay | |
| Europe | Bulgaria |
| Czech Republic | |
| Denmark | |
| France | |
| Germany | |
| Slovakia | |
| Spain | |
| Switzerland | |
| Turkey | |
| United Kingdom | |
| Asia | China |
| India | |
| Japan | |
| Malaysia | |
| Nepal | |
| Philippines | |
| Taiwan | |
| Middle East | Israel |
| Africa | South Africa |
| Oceania | Australia |
| New Zealand |