 11. Participants taking medications including any current treatment with antipsychotics, antidepressants, mood stabilizers, psychostimulants and psychostimulant appetite suppressants, or past treatment with isoniazid, glucocorticoids, centrally active antihypertensive drugs e.g., clonidine, reserpine, or sedative hypnotic medications e.g. benzodiazepines, barbiturates, within 1 week prior to study enrollment. Treatment within six months with any of the following: hormone use i.e. testosterone, DHEA, opioid drugs. 