I added about 15 or so studies to the “Other references” page, most of them quite interesting, but not so relevant for the main points of this website. In addition, I found two German studies about the outcomes of surgery. One is a doctoral thesis by Ulrike Ruppin from 2013, and it studied 100 transsexuals about 15 years after surgery. The results are quite detailed and positive, without a single case of regret.