Massey, A., Campbell, B. K., Raine-Fenning, N., Pincott-Allen, C., Perry, J., & Vedhara, K. (2016). Relationship between hair and salivary cortisol and pregnancy in women undergoing IVF. Psychoneuroendocrinology, 74, https://doi.org/10.1016/j.psyneuen.2016.08.027