A post on sci.life-extension of the abstract http://pmid.us/18294626
was of great interest to me because of my fairly low testosterone -
the result of having only one testicle since the occurrence of
accidental torsion at age 31 - albeit without any major symptoms of
low testosterone. The referenced paper is a review of thymic
involutions particularly as affected and reversed by sex steroids and,
respectively, their elimination. Notably, I have been able to maintain
a high level of immunity into my 70s, possibly aided by my lower level
of testosterone reducing my rate of thymic involution.

Since I was able to obtain the full paper, I replied to the posting of
the abstract with some elucidating quotes from the paper at the link:
http://tinyurl.com/5nvuzl

Any additional comments or questions should be posted to
sci.life-extension since that is where the thread began.
This note is merely for those people who may be interested, but don't
regularly read sci.life-extension as I and Kitty do.

--Paul