Final answer:
The Declaration of Helsinki mainly addresses researchers, doctors, and patients, providing ethical guidelines for medical research involving human subjects.
Step-by-step explanation:
The Declaration of Helsinki mainly addresses researchers, doctors, and patients. It sets out ethical principles and guidelines for conducting medical research involving human subjects. The Declaration emphasizes the importance of protecting participant privacy, obtaining informed consent, minimizing risks, and ensuring fair selection of research subjects. It also aims to promote the well-being and rights of patients and participants in clinical trials.