cortisol heritability R code for the estimate of heritability and maternal effects on cortisol levels in chimpanzees, used in: Non-genetic maternal effects shape individual differences in cortisol phenotypes in wild chimpanzees Tkaczynski et al.,2021 https://www.biorxiv.org/content/10.1101/2021.07.16.452609v1 doi: https://doi.org/10.1101/2021.07.16.452609