https://health.usnews.com/health-care/patient-advice/articles/tongue-scraping
https://www.sciencedaily.com/releases/2020/08/200813123608.htm?fbclid=IwAR1L3ICURVNuaTZ_n_rvJESZfSr6sLb9SOiTjdIofUHI9Wwj8H9hlHi4U9k
https://youtu.be/VJ1QsM9z6sI?list=PLVfkVnYaYS8FEatPKBMyoupuNTuEvBEG3