Yang, Z., Brentnall, A. R., Cuzick, J., & Sasieni, P. (2012). Estimating the Complier Average Causal Effect for Exponential Survival in the Presence of Mid-Trial Switching. International Journal of Statistics in Medical Research, 1(2), 84–90. https://doi.org/10.6000/1929-6029.2012.01.02.01