Moorman PG, Berchuck A, Calingaert B, Halabi S, Schildkraut JM. Antidepressant medication use for and risk of ovarian cancer. Obstet Gynecol. 2005 Apr 1;105(4):725-30.
Rothman KJ, Greenland S. Causation and causal inference in epidemiology. Am J Public Health. 2005 Jan 1;95(Suppl 1):S144-150.