12. Unique Screeni ng Labs : Active and clinically significant bacterial, fungal, or viral infection, including hepatitis B surface antigen, hepatitis B c ore antibody, hepatitis C antibody, known human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS) -related illness is exclusionary per Exclusion Criteria # 9. In equivocal cases, subjects may be eligible if they have a negative viral load. Samples will be analyzed locally.