DHT differs from testosterone by the absence of a single double bond on ring A Figure 3A 13, which increases its affinity for the AR two fold and decreases the rate of dissociation five fold relative to testosterone 66, differences that account for essential, DHT specific functions
doxycycline for fish However, as there are no screening programs for breast cancer among thyroid cancer survivors or vice versa, surveillance bias is unlikely to account for the preferential association of these tumor types
