1. Department of Medicine, Division of Pulmonary and Critical Care Medicine, Women’s Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California
2. Clinical Laboratory and Laboratory Research Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
3. Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California; and
4. Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California