1. Chinese Evidence‐Based Medicine CenterWest China HospitalSichuan University Chengdu P.R. China
2. West China School of MedicineSichuan University Chengdu P.R. China
3. School of Clinical MedicineChengdu University of Traditional Chinese Medicine Chengdu P.R. China
4. West China HospitalSichuan University Chengdu P.R. China