International College of Applied Kinesiology-U.S.A. (ICAK-U.S.A.), 25 Mar 2020 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7074995/?fbclid=IwAR2fk8_7MMHm4xNd21ahASzB26-NIrq0HtIbwWhyVNnm8iDA_2VLWS5Xkq0