Counterfactual threshold for ozone (Jerret et al 2009)

cf_o3

Format

An object of class numeric of length 1.

Source

Jerrett, M., Burnett, R.T., Pope III, C.A., Ito, K., Thurston, G., Krewski, D., Shi, Y., Calle, E. and Thun, M., 2009. Long-term ozone exposure and mortality. New England Journal of Medicine, 360(11), pp.1085-1095.