profession is a zone of https://bookmark-dofollow.com/story23339171/%D0%B8%D0%BC%D0%BF%D0%BB%D0%B0%D0%BD%D1%82%D0%B0%D1%86%D0%B8%D1%8F-%D0%B2%D1%81%D1%91-%D0%BD%D0%B0-%D1%88%D0%B5%D1%81%D1%82%D0%B8 (for example, maxillofacial surgery) officially recognized by the National Commission of Dental Specialties and certification boards.
