1. Department of Laboratory Medicine West China Hospital Sichuan University Chengdu China
2. West China School of Medicine Sichuan University Chengdu China
3. Department of Thoracic Surgery West China Hospital Sichuan University Chengdu China
4. Sidney Kimmel School of Medicine Thomas Jefferson University Philadelphia PA USA
5. Department of Biostatistics Princess Margaret Cancer Centre University Health Network Toronto ON Canada
6. Dalla Lana School of Public Health University of Toronto Toronto ON Canada