2. Any serious medical condition that places the patient at an unacceptable risk if he or she participates in this study. Examples of such a medical condition are, but are not limited to, patient with unstable cardiac disease as defined by: Cardiac events such as MI within the past 6 months, NYHA heart failure class III-IV, uncontrolled atrial fibrillation or hypertension; patients with conditions requiring chronic steroid or immunosuppressive treatment, such as rheumatoid arthritis, multiple sclerosis and lupus, that likely need additional steroid or immunosuppressive treatments in addition to the study treatment.