1. Central Laboratory, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Yan-chang-zhong Road, Shanghai 200072, P. R. China
2. Department of Medical Ultrasound, Shanghai Chest Hospital, Shanghai Jiao Tong University, No.241 West Huaihai Road, Shanghai 200030, P. R. China
3. Department of Medical Oncology, Shanghai Pulmonary Hospital, Thoracic Cancer Institute, Tongji University School of Medicine, No. 507 Zheng-Min Road, Shanghai 200433, P. R. China