1. PSPbSMU named after academician I.P. Pavlov, Department of Propaedeutics of Dental Diseases, Saint-Petersburg, Russian Federation
2. PSPbSMU named after Academician I.P. Pavlov, Department of Surgical Dentistry and Maxillofacial Surgery, Saint-Petersburg, Russian Federation
3. OOO "Renident", Saint-Petersburg, Russian Federation
4. Gorodsky dental polyclinic No. 1, Saint-Petersburg, Russian Federation