"Sex-reassignment surgery is 'an experiment right now,' [McHugh] says. 'We’re doing an experiment. We have lots of publications that are telling us that the evidence base for these treatments is very low-quality.' There are 'not enough subjects, not enough good results—not enough anything. Not enough comparisons . . . that would make it evidence-based.' He says the Institutional Review Board should oversee all such surgery. It doesn’t."