What's new in the quantification of causal effects from longitudinal cohort studies: a brief introduction to marginal structural models for intensivists.

Bailly S, Pirracchio R, Timsit JF.

Intensive Care Med. 2016 Apr;42(4):576-9. doi: 10.1007/s00134-015-3919-6. Epub 2015 Jun 24.