Walker, K. F., Bugg, G. J., Macpherson, M., McCormick, C., Grace, N., Wildsmith, C., Bradshaw, L., Smith, G. C., & Thornton, J. (2016). Randomized trial of labor induction in women 35 years of age or older. New England Journal of Medicine, 374(9), https://doi.org/10.1056/NEJMoa1509117