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Clinical trials are a crucial element in medicine and health care to help develop drugs that will treat or possibly cure certain diseases. Researchers use clinical trials to test if a drug works, how well it works, how safe it is and how it compares to any currently available treatments.

Before a drug can be tested on human patients, it is tested for years in labs. Clinical trials are among the final steps of the drug development process. When drugs are brought to clinical trials, pharmaceutical companies must find enough patients to participate in the research in order to get solid results. The rarer the condition, the more difficult it can be to find the number of patients needed for a trial.