Briefly describe the 3 phases of clinical trials. Be sure to include relative sizes of groups, who is included, and what the goal is for each phase. Then comment briefly on the advantages and disadvantages of following such a process.

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Briefly describe the 3 phases of clinical trials. Be sure to include relative sizes of groups, who is included, and what the goal is for each phase. Then comment briefly on the advantages and disadvantages of following such a process.
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