Intracranial infection. 
Severe respiratory and circulatory system diseases. 
Hematologic malignancies. 
Positive serological tests such as AIDS, hepatitis B virus, hepatitis C virus and syphilis （antigen or antibody）. 
Tumors. 
Genetic and metabolic diseases.       
    

NCT01929434_exc_T1
Condition
Intracranial infection
NCT01929434_exc_T2
Condition
circulatory system disease
NCT01929434_exc_T3
Condition
respiratory system disease
NCT01929434_exc_T4
Qualifier
Severe
NCT01929434_exc_T5
Scope
respiratory and circulatory system diseases
NCT01929434_exc_T6
Condition
Hematologic malignancies
NCT01929434_exc_T7
Condition
AIDS
NCT01929434_exc_T8
Condition
hepatitis B virus
NCT01929434_exc_T9
Condition
hepatitis C virus
NCT01929434_exc_T10
Condition
syphilis
NCT01929434_exc_T11
Condition
Tumors
NCT01929434_exc_T13
Condition
metabolic diseases
NCT01929434_exc_T14
Condition
Genetic diseases