You never know...

When I was seventeen, I signed up with the National Marrow Donor Program. They took a tube of blood. Aside from the occasional e-mail and postcard, I don't hear from them very much. About a year or so ago, I also signed up with The Caitlyn Raymond International Registry. They were having a sign-up drive near my office, and asked me to sign up despite already being on the NMDP registry.

( cut for length and medical details... )