1. Department of Central Laboratory Shenyang Tenth People's Hospital Shenyang Chest Hospital Shenyang Liaoning 110044 P. R. China
2. Novogene Corporation Limited Beijing 100083 P. R. China
3. Department of Thoracic Surgery Shenyang Tenth People's Hospital Shenyang Chest Hospital Shenyang Liaoning 110044 P. R. China