Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
 English thesaurus
observational trial
med. A type of clinical trial. In observational trials, researchers do not assign participants to a treatment or intervention. Instead, the researchers observe participants over time to determine health outcomes. see also clinical trial

 The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error | Get short URL | Language Selection Tips