['coronary artery disease']
['ticagrelor', 'clopidogrel']

        Inclusion Criteria:

          1. Stable Coronary Artery Disease (1) stable angina (2) low-risk unstable angina (3)
             variant angina (4) patients with asymptomatic with appropriate therapy（including
             percutaneous coronary intervention）

          2. Diabetes

        Exclusion Criteria:

          1. ACS

          2. planned use of glycoprotein IIb/IIIa receptor inhibitors, adenosine diphosphate (ADP)
             receptor antagonists, aspirin or anticoagulant therapy during the study period

          3. platelet count <100g/L

          4. creatinine clearance rate < 30ml/min

          5. diagnosed as respiratory or circulatory instability (cardiac shock, severe congestive
             heart failure NYHA II-IV or left ventricular ejection fraction < 40%)

          6. a history of bleeding tendency

          7. ticagrelor or clopidogrel allergies
      