1. School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
2. Department of Medical Imaging, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
3. Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
4. Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
5. Department of Cardiology, Institute of Cardiovascular Research, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China