- Patients with serious comorbidities or uncontrolled medical conditions that the investigator feels might compromise study participation (including but not limited to: myocardial infarction, congestive heart failure (NYHA>2), unstable angina, active cardiomyopathy, unstable ventricular arrhythmia, uncontrolled psychotic disorders, uncontrolled hypertension and cerebrovascular disease with previous stroke within 6 months, serious infections，positive HIV test, poorly controlled diabetes mellitus with fasting blood-glucose >8mmol/L or 2-hour postprandial blood glucose >11mmol/L within the past month).