Research Centers
 | Afghanistan |  | Dominican Republic |  | Latvia |  | Saudi Arabia |
 | Algeria |  | DPR Korea |  | Lebanon |  | Serbia |
 | Argentina |  | Ecuador |  | Lesotho |  | Sierra Leone |
 | Australia |  | Egypt |  | Macedonia |  | Slovenia |
 | Austria |  | Ethiopia |  | Malawi |  | Somalia |
 | Bahamas |  | Fiji |  | Malaysia |  | South Africa |
 | Bahrain |  | Finland |  | Maldives |  | South Sudan |
 | Bangladesh |  | France |  | Malta |  | Spain |
 | Belarus |  | Gabon |  | Mauritius |  | Sri Lanka |
 | Belgium |  | Germany |  | Mexico |  | Sudan |
 | Bhutan |  | Ghana |  | Mongolia |  | Suriname |
 | Bosnia |  | Greece |  | Morocco |  | Sweden |
 | Botswana |  | Haiti |  | Mozambique |  | Switzerland |
 | Brazil |  | Hong Kong |  | Myanmar |  | Syria |
 | Brunei |  | Hungary |  | Namibia |  | Tajikistan |
 | Bulgaria |  | Iceland |  | Nepal |  | Tanzania |
 | Burkina Faso |  | Indonesia |  | Netherlands |  | Thailand |
 | Cambodia |  | Iran |  | New Guinea |  | Tibet |
 | Cameroon |  | Ireland |  | New Zealand |  | Turkey |
 | Canada |  | Israel |  | Niger |  | Turkmenistan |
 | Chile |  | Italy |  | Nigeria |  | UAE |
 | China |  | Ivory Coast |  | Norway |  | Uganda |
 | Colombia |  | Japan |  | Oman |  | Ukraine |
 | Costa Rica |  | Jordan |  | Pakistan |  | United Kingdom |
 | Croatia |  | Kazakhstan |  | Palestine |  | United States of America |
 | Cuba |  | Kenya |  | Poland |  | Vietnam |
 | Cyprus |  | Kuwait |  | Qatar |  | Zambia |
 | Czechoslovakia |  | Kyrgyzstan |  | Romania |  | Zimbabwe |
 | Democratic Republic of Congo |  | Laos |  | Russia | — | — |