1. College of Finance Fujian Jiangxia University Fuzhou China
2. Department of Thoracic Surgery Fujian Medical University Union Hospital Fuzhou Fujian China
3. Key Laboratory of Cardio‐Thoracic Surgery (Fujian Medical University) Fujian Province University Fuzhou Fujian China
4. Department of Pharmaceutical and Health Economics, School of Pharmacy University of Southern California Los Angeles California USA