Brickell, J. S., McGowan, M. M., Pfeiffer, D. U., & Wathes, D. C. Mortality in Holstein-Friesian calves and replacement heifers, in relation to body weight and IGF-I concentration, on 19 farms in England. Animal, 3(8), 1175-1182. https://doi.org/10.1017/s175173110900456x