The study title is STEED (Servicemens Testicular tumor Environmental Endocrine Determinants Study). What is Environmental Endocrine Determinants?
There are some artificial and naturally occurring chemicals in our environment that may affect the balance of regular hormonal functions in animals. These chemicals, also known as Endocrine Disrupting Chemicals or EDCs, may mimic the sex hormones estrogen or testosterone, thereby producing similar responses to them, or they may block the activities of estrogen or testosterone.