Cite
MLA Citation
Jon M Gran and Odd O Aalen. “Letter to the Editor: Comparison of statistical approaches dealing with time-dependent confounding in drug effectiveness studies (SMMR, Vol. 27, Issue 6, 2018).” Statistical methods in medical research, vol. 28, 2019, pp. 321–322. http://access.bl.uk/ark:/81055/vdc_100078182477.0x000042