https://escholarship.org/content/qt7tx4q6hj/qt7tx4q6hj_noSplash_4782934aa280a3dde78aed8df46aefa3.pdf Authors Published Date: 2017
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6663309/pdf/nihms-1036802.pdf Published Date: 2019-Jun