1.
Allignol A, Schumacher M, Beyersmann J. Empirical Transition Matrix of Multi-State Models: The etm Package. J. Stat. Soft. [Internet]. 2011 Jan. 4 [cited 2024 Apr. 19];38(4):1-15. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v038i04