Biomarkers for chronic stress in hair

The lit reveiw should be on how cortisol can be used as a biomarker to messure chronic stress in hair. Because hair grows an average of 1cm per month. we should be able to messure stress levels over a long period of time using a strand of hair. eventualy leading to a correlation between stress levels annd disease onset.
attached is a usefull paper.
https://www.sciencedirect.com/science/article/pii/S0306453011002794?via%3Dihub

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