 - patients with serious complications such as: serious heart disease remained unstable after treatment, or myocardial infarction, congestive heart failure, unstable angina, frank pericardial effusion or unstable arrhythmias in 6 months before being enrolled into the group; confirmed neuropathy or psychosis, including dementia or epilepsia; uncontrolled infection;active disseminated intravascular coagulation;uncontrolled diabetes, fasting serum glucose 7.8mmol L 