One of many, many citations: [0]. This is not something surprising, it's been ongoing since before the USA was a country. [0] https://www.mayoclinicproceedings

One of many, many citations: [0]. This is not something surprising, it's been ongoing since before the USA was a country. [0] https://www.mayoclinicproceedings.org/article/S0025-6196%2821%2900322-0/fulltext https://www.mayoclinicproceedings.org/article/S0025-6196%282...