like i mentioned previously, the profile section is backed by numerous studies which are referenced at the end of each, and if you check them, like i have, you'll have your answers...otherwise, i don't usually rely on others to post info, since it's very simple to go to Google Scholar and type in "arimidex estradiol" and find lots of studies...if any of you guys need help accessing some of the publications, let me know...i got a username and password for many of them this semester when i started my nuc med program...
and fyi, letrozole has been shown to reverse gyno, and is a superior AI than any mentioned here...again, lots of info on it in the profile section
AM