Murphy, T. E., P.H. Van Ness, K.L.B. Araujo, and M.A. Pisani. “An Empirical Method of Detecting Time-Dependent Confounding: An Observational Study of Next Day Delirium in a Medical ICU”. International Journal of Statistics in Medical Research 5, no. 1 (January 8, 2016): 41–47. Accessed November 23, 2024. https://mail.lifescienceglobal.com/pms/index.php/ijsmr/article/view/3542.