Clinical trials are experiments done in clinical research. Clinical trials generate data on safety and efficacy. They are conducted only after they have received health authority/ethics committee approval in the country where approval of the therapy is sought. These authorities are responsible for vetting the risk/benefit ratio of the trial - their approval does not mean that the therapy is 'safe' or effective, only that the trial may be conducted.
Related Journals of Medical Clinical Studies
Journal of Clinical Studies & Medical Case Reports, International Journal of Case Studies, BMJ Case Reports, Journal of Clinical Studies, International Research Journal of Basic and Clinical Studies, Medical Case Studies