http://www.youtube.com/watch?feature=player_embedded&v=A3C4ZJ7HyuE
taken from this talk:  https://www.youtube.com/watch?v=LOY3QH_jOtE&feature=youtu.be&t=1h23m52s

AMA and APA statements on transpeople and medically necessary surgeries (hard statistics referenced):
http://www.cristanwilliams.com/b/wp-content/uploads/2013/02/12-36-apa-position-statements-on-transgender-1.pdf
http://www.gires.org.uk/assets/Medpro-Assets/AMA122.pdf    (<----I fixed this link)

Hard empirical statistics pdf, some of which are referenced in the above two pdf's:
http://www.thetaskforce.org/downloads/reports/reports/ntds_full.pdf

http://gallae.com/cathy/essay12.html  (explains differences very well, but I do not condone TS separatist while I am TS myself)
 
http://www.transadvocate.com/extreme-pressures-faced-by-trans-people.htm