Clinical trials are experimental situations where there is random allocation of patients to different protocols, and an artificial manipulation of the study. Thus there is a difference between this and other studies where the investigator is an observer. For this reason clinical trials are subject to more ethical considerations, are generally very expensive to run and are usually carried out as a result of a meaningful finding in some other sort of study.
Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page