Bibian van der Voorn

48 CHAPTER 3 27 Berger, H. M., King, J., Doughty, S. & Wharton, B. A. Nutrition, sex, gestational age, and hair growth in babies. Arch Dis Child 53 , 290-294 (1978). 28 Furdon, S. A. & Clark, D. A. Scalp hair characteristics in the newborn infant. Adv Neonatal Care 3 , 286-296 (2003). 29 Liu, C. H., Snidman, N., Leonard, A., Meyer, J. & Tronick, E. Intra-individual stability and developmental change in hair cortisol among postpartum mothers and infants: Implications for understanding chronic stress. Dev Psychobiol 58 , 509-518 (2016). 30 Ackermans, M. T. & Endert, E. LC-MS/MS in endocrinology: what is the profit of the last 5 years? Bioanalysis 6 , 43-57 (2014). 31 Shackleton, C. Clinical steroid mass spectrometry: a 45- year history culminating in HPLC-MS/MS becoming an essential tool for patient diagnosis. J Steroid Biochem Mol Biol 121 , 481-490 (2010).