Cheung, Y., Xu, Y., Tan, S., Cutts, F., Milligan, P., & S'PORE, D. G. M. S. (2014). Estimation of intervention effects using first or multiple episodes in clinical trials: The Andersen-Gill model re-examined.

Cheung, Y.B., Y. Xu, S.H Tan, F. Cutts, P. Milligan, and DUKE-NUS GRADUATE MEDICAL SCHOOL S'PORE. Estimation of Intervention Effects Using First or Multiple Episodes in Clinical Trials: The Andersen-Gill Model Re-examined. 2014.

Cheung, Y.B., et al. Estimation of Intervention Effects Using First or Multiple Episodes in Clinical Trials: The Andersen-Gill Model Re-examined. 2014.