3. Taking any other medications, including over the counter supplements with the exception of oral contraceptives for women
4. Pregnancy. Females of child-bearing age must be using an effective contraceptive method.
5. History of smoking, substance abuse or dependence.
6. Contraindication to MR scan (claustrophobia, cardiac pacemakers, metal clips and stents on blood vessels, artificial heart valves, artificial arms, hands, legs, etc., brain stimulator devices, implanted drug pumps, ear implants, eye implants or known metal fragments in eyes, exposure to shrapnel or metal filings, other metallic surgical hardware in vital areas, certain tattoos with metallic ink, certain transdermal patches, metal- containing intrauterine devices)
7. Medical condition that would prevent blood draws, including current anti-coagulant or anti-aggregant therapy, tendency for abnormal scarring (e.g. keloids).
