| Afghanistan(Symptom Trials 13 , Drug Trials 16) |
| Albania(Symptom Trials 26 , Drug Trials 4) |
| Algeria(Symptom Trials 65 , Drug Trials 5) |
| American Samoa(Symptom Trials 16) |
| Andorra(Symptom Trials 22 , Drug Trials 8) |
| Angola(Symptom Trials 3) |
| Argentina(Symptom Trials 6169 , Drug Trials 2104) |
| Armenia(Symptom Trials 12 , Drug Trials 11) |
| Australia(Symptom Trials 18072 , Drug Trials 5456) |
| Austria(Symptom Trials 10857 , Drug Trials 3140) |
| Azerbaijan(Drug Trials 7) |
| Bahrain(Symptom Trials 54 , Drug Trials 15) |
| Bangladesh(Symptom Trials 319 , Drug Trials 216) |
| Barbados(Symptom Trials 18 , Drug Trials 7) |
| Belarus(Symptom Trials 356 , Drug Trials 37) |
| Belgium(Symptom Trials 16563 , Drug Trials 4751) |
| Belize(Symptom Trials 34 , Drug Trials 16) |
| Benin(Symptom Trials 33 , Drug Trials 38) |
| Bermuda(Symptom Trials 8 , Drug Trials 1) |
| Bolivia(Symptom Trials 51 , Drug Trials 35) |
| Bosnia and Herzegovina(Symptom Trials 380 , Drug Trials 88) |
| Botswana(Symptom Trials 131 , Drug Trials 91) |
| Brazil(Symptom Trials 9050 , Drug Trials 3048) |
| Bulgaria(Symptom Trials 2816 , Drug Trials 843) |
| Burkina Faso(Symptom Trials 133 , Drug Trials 255) |
| Burma(Symptom Trials 15 , Drug Trials 20) |
| Cambodia(Symptom Trials 48 , Drug Trials 55) |
| Cameroon(Symptom Trials 117 , Drug Trials 71) |
| Canada(Symptom Trials 47702 , Drug Trials 12771) |
| Central African Republic(Symptom Trials 24 , Drug Trials 2) |
| Chile(Symptom Trials 3239 , Drug Trials 1004) |
| China(Symptom Trials 8581 , Drug Trials 2504) |
| Colombia(Symptom Trials 2059 , Drug Trials 698) |
| Congo, Democratic Republic of (Symptom Trials 42 , Drug Trials 35) |
| Congo, Republic of the(Symptom Trials 9 , Drug Trials 4) |
| Costa Rica(Symptom Trials 680 , Drug Trials 302) |
| Cote d'Ivoire(Symptom Trials 34 , Drug Trials 42) |
| Croatia(Symptom Trials 2354 , Drug Trials 825) |
| Cuba(Symptom Trials 38 , Drug Trials 11) |
| Cyprus(Symptom Trials 138 , Drug Trials 49) |
| Czech Republic(Symptom Trials 8433 , Drug Trials 2503) |
| Denmark(Symptom Trials 13419 , Drug Trials 2887) |
| Dominican Republic(Symptom Trials 253 , Drug Trials 101) |
| Ecuador(Symptom Trials 379 , Drug Trials 143) |
| Egypt(Symptom Trials 951 , Drug Trials 426) |
| El Salvador(Symptom Trials 60 , Drug Trials 29) |
| Estonia(Symptom Trials 1909 , Drug Trials 618) |
| Ethiopia(Symptom Trials 115 , Drug Trials 48) |
| Fiji(Symptom Trials 50) |
| Finland(Symptom Trials 6734 , Drug Trials 1564) |
| France(Symptom Trials 33439 , Drug Trials 9010) |
| Gabon(Symptom Trials 52 , Drug Trials 88) |
| Georgia(Symptom Trials 262 , Drug Trials 48) |
| Germany(Symptom Trials 37872 , Drug Trials 10268) |
| Ghana(Symptom Trials 163 , Drug Trials 218) |
| Greece(Symptom Trials 5277 , Drug Trials 1741) |
| Guadeloupe(Symptom Trials 24 , Drug Trials 2) |
| Guatemala(Symptom Trials 581 , Drug Trials 257) |
| Guinea(Symptom Trials 24 , Drug Trials 9) |
| Guinea-Bissau(Symptom Trials 62 , Drug Trials 83) |
| Haiti(Symptom Trials 64 , Drug Trials 54) |
| Honduras(Symptom Trials 100 , Drug Trials 37) |
| Hong Kong (SAR)(Symptom Trials 3125 , Drug Trials 858) |
| Hungary(Symptom Trials 7110 , Drug Trials 2157) |
| Iceland(Symptom Trials 315 , Drug Trials 96) |
| India(Symptom Trials 6665 , Drug Trials 2175) |
| Indonesia(Symptom Trials 601 , Drug Trials 254) |
| Iran(Symptom Trials 1105 , Drug Trials 409) |
| Iraq(Symptom Trials 15 , Drug Trials 9) |
| Ireland(Symptom Trials 3022 , Drug Trials 1168) |
| Israel(Symptom Trials 13752 , Drug Trials 2835) |
| Italy(Symptom Trials 23685 , Drug Trials 6723) |
| Jamaica(Symptom Trials 123 , Drug Trials 4) |
| Japan(Symptom Trials 8652 , Drug Trials 2058) |
| Jordan(Symptom Trials 163 , Drug Trials 70) |
| Kazakhstan(Symptom Trials 90 , Drug Trials 21) |
| Kenya(Symptom Trials 406 , Drug Trials 319) |
| Korea, North(Symptom Trials 17 , Drug Trials 3) |
| Korea, South(Symptom Trials 9297 , Drug Trials 3003) |
| Kuwait(Symptom Trials 95 , Drug Trials 32) |
| Latvia(Symptom Trials 1717 , Drug Trials 507) |
| Lebanon(Symptom Trials 542 , Drug Trials 139) |
| Liberia(Symptom Trials 5) |
| Libya(Symptom Trials 12 , Drug Trials 1) |
| Lithuania(Symptom Trials 1968 , Drug Trials 575) |
| Luxembourg(Symptom Trials 190 , Drug Trials 81) |
| Macedonia, The Former Yugoslav(Symptom Trials 271 , Drug Trials 47) |
| Madagascar(Symptom Trials 31 , Drug Trials 25) |
| Malawi(Symptom Trials 215 , Drug Trials 268) |
| Malaysia(Symptom Trials 1835 , Drug Trials 533) |
| Mali(Symptom Trials 186 , Drug Trials 185) |
| Malta(Symptom Trials 127 , Drug Trials 39) |
| Martinique(Symptom Trials 6 , Drug Trials 2) |
| Mauritania(Symptom Trials 3 , Drug Trials 2) |
| Mauritius(Symptom Trials 6) |
| Mexico(Symptom Trials 7013 , Drug Trials 2192) |
| Moldova(Symptom Trials 83 , Drug Trials 32) |
| Monaco(Symptom Trials 28 , Drug Trials 15) |
| Mongolia(Symptom Trials 16 , Drug Trials 4) |
| Morocco(Symptom Trials 285 , Drug Trials 54) |
| Mozambique(Symptom Trials 79 , Drug Trials 159) |
| Nauru(Symptom Trials 8) |
| Nepal(Symptom Trials 42 , Drug Trials 20) |
| Netherlands(Symptom Trials 18890 , Drug Trials 5111) |
| Netherlands Antilles(Symptom Trials 3) |
| New Caledonia(Symptom Trials 9) |
| New Zealand(Symptom Trials 4284 , Drug Trials 1416) |
| Nicaragua(Symptom Trials 30) |
| Niger(Symptom Trials 18 , Drug Trials 3) |
| Nigeria(Symptom Trials 134 , Drug Trials 78) |
| Northern Mariana Islands(Symptom Trials 9) |
| Norway(Symptom Trials 8059 , Drug Trials 2009) |
| Oman(Symptom Trials 35 , Drug Trials 10) |
| Pakistan(Symptom Trials 827 , Drug Trials 363) |
| Panama(Symptom Trials 456 , Drug Trials 264) |
| Papua New Guinea(Symptom Trials 21 , Drug Trials 17) |
| Paraguay(Symptom Trials 97 , Drug Trials 1) |
| Peru(Symptom Trials 2947 , Drug Trials 1119) |
| Philippines(Symptom Trials 2197 , Drug Trials 708) |
| Poland(Symptom Trials 12111 , Drug Trials 3372) |
| Portugal(Symptom Trials 4660 , Drug Trials 1602) |
| Puerto Rico(Symptom Trials 8038 , Drug Trials 4297) |
| Qatar(Symptom Trials 81 , Drug Trials 17) |
| Romania(Symptom Trials 4451 , Drug Trials 1413) |
| Russia(Symptom Trials 8626 , Drug Trials 2622) |
| Rwanda(Symptom Trials 38 , Drug Trials 57) |
| Réunion(Symptom Trials 23 , Drug Trials 2) |
| Saint Kitts and Nevis(Symptom Trials 16 , Drug Trials 4) |
| Saudi Arabia(Symptom Trials 556 , Drug Trials 115) |
| Senegal(Symptom Trials 74 , Drug Trials 98) |
| Seychelles(Symptom Trials 5 , Drug Trials 5) |
| Sierra Leone(Symptom Trials 3) |
| Singapore(Symptom Trials 4018 , Drug Trials 1083) |
| Slovakia(Symptom Trials 4359 , Drug Trials 1196) |
| Slovenia(Symptom Trials 1141 , Drug Trials 346) |
| South Africa(Symptom Trials 7197 , Drug Trials 2553) |
| Spain(Symptom Trials 19129 , Drug Trials 5779) |
| Sri Lanka(Symptom Trials 73 , Drug Trials 32) |
| Sudan(Symptom Trials 24 , Drug Trials 43) |
| Swaziland(Symptom Trials 2 , Drug Trials 18) |
| Sweden(Symptom Trials 11168 , Drug Trials 2939) |
| Switzerland(Symptom Trials 13038 , Drug Trials 4008) |
| Syria(Symptom Trials 29 , Drug Trials 4) |
| Taiwan(Symptom Trials 9815 , Drug Trials 2341) |
| Tanzania(Symptom Trials 398 , Drug Trials 372) |
| Thailand(Symptom Trials 3592 , Drug Trials 1450) |
| The Bahamas(Symptom Trials 36 , Drug Trials 33) |
| The Gambia(Symptom Trials 67 , Drug Trials 115) |
| Togo(Symptom Trials 6 , Drug Trials 8) |
| Trinidad and Tobago(Symptom Trials 21 , Drug Trials 2) |
| Tunisia(Symptom Trials 504 , Drug Trials 93) |
| Turkey(Symptom Trials 4314 , Drug Trials 1258) |
| Uganda(Symptom Trials 542 , Drug Trials 361) |
| Ukraine(Symptom Trials 3454 , Drug Trials 865) |
| United Arab Emirates(Symptom Trials 276 , Drug Trials 52) |
| United Kingdom(Symptom Trials 30455 , Drug Trials 8058) |
| Uruguay(Symptom Trials 161 , Drug Trials 90) |
| Uzbekistan(Symptom Trials 3 , Drug Trials 5) |
| Venezuela(Symptom Trials 540 , Drug Trials 239) |
| Vietnam(Symptom Trials 283 , Drug Trials 107) |
| Zambia(Symptom Trials 249 , Drug Trials 199) |
| Zimbabwe(Symptom Trials 100 , Drug Trials 73) |
