| 1 | Australian New Zealand Clinical Trials Registry (ANZCTR) | http://www.anzctr.org.au/ |
| 2 | Brazilian Clinical Trials Registry (ReBec) | http://www.ensaiosclinicos.gov.br/ |
| 3 | Chinese Clinical Trial Registry (ChiCTR) | http://www.chictr.org.cn/index.aspx |
| 4 | Clinical Research Information Service (CRiS), Republic of Korea | http://ctri.nic.in/Clinicaltrials/login.php |
| 5 | United States National Library of Medicine | https://www.clinicaltrials.gov |
| 6 | Clinical Trials Registry - India (CTRI) | http://ctri.nic.in/Clinicaltrials/login.php |
| 7 | Cuban Public Registry of Clinical Trials (RPCEC) | http://registroclinico.sld.cu/en/home |
| 8 | EU Clinical Trials Register (EU-CTR) | https://www.clinicaltrialsregister.eu/ |
| 9 | German Clinical Trials Register (DRKS) | https://www.drks.de/drks_web/ |
| 10 | Iranian Registry of Clinical Trials (IRCT) | https://www.irct.ir/ |
| 11 | Japan Primary Registries Network (JPRN) | https://rctportal.niph.go.jp/en/ |
| 12 | Thai Clinical Trials Registry (TCTR) | http://www.clinicaltrials.in.th/ |
| 13 | Lebanese Clinical Trials Registry (LBCTR) | http://lbctr.emro.who.int/Trials/View# |
| 14 | The Netherlands National Trial Register (NTR) | https://www.trialregister.nl/ |
| 15 | Pan African Clinical Trial Registry (PACTR) | https://pactr.samrc.ac.za/ |
| 16 | Peruvian Clinical Trial Registry (REPEC) | https://ensayosclinicos-repec.ins.gob.pe/en/ |
| 17 | Sri Lanka Clinical Trials Registry (SLCTR) | http://www.slctr.lk/ |