@article {646637,
	title = {The Challenges of Parameterizing Direct Effects in Individual-Level Simulation Models},
	journal = {Medical Decision Making},
	volume = {40},
	number = {1},
	year = {2020},
	pages = {106-111},
	url = {https://doi.org/10.1177/0272989X19894940},
	author = {Murray, Eleanor J and Robins, James M and George R Seage III and Freedberg, Kenneth A and Hernan, Miguel A}
}
