¹ https://www.researchgate.net/publication/317224618_The_impact_of_occupationrelated_musculoskeletal_disorders_on_dental_hygienists
²https://jada.ada.org/article/S0002-8177(14)65116-3/fulltext
³https://www.osha.gov/dcsp/smallbusiness/safetypays/estimator.html