Aiello EJ, Buist DS, Wagner EH, Tuzzio L, Greene SM, Lamerato LE, Field TS, Herrinton LJ, Haque R, Hart G, Bischoff KJ, Geiger AM. Diffusion of aromatase inhibitors for breast cancer therapy between 1996 and 2003 in the Cancer Research Network. Breast Cancer Res Treat. 2008 Feb; 107(3):397-403.