Doward LC, Meads DM, Fisk JD, McKenna SP, Eckert BJ. Derivation of a unidimensional scale from the fatigue impact scale. Mult Scler. 2006 Sep;12(Suppl 1):S1-S228.
Wood CE, Register TC, Franke AA, Anthony MS, Cline JM. Dietary soy isoflavones inhibit estrogen effects in the postmenopausal breast. Cancer Res. 2006 Jan 15;66(2):1241-9.