A doctor is a person with special education and experience who recognizes and treats diseases. He must have the skills and qualifications, permission to practice medicine. Each doctor has his own area of knowledge, direction in medical activity. Understanding what professions are in medicine can be very useful. For example, a dentist is not a dentist, as some people think, an ENT can be a speech therapist, and a psychiatrist does not treat mental problems. There are more than a hundred specialties in medicine.
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