1. Department of Pathology, University of Texas Medical Branch John Sealy School of Medicine, 301 University Blvd, Galveston, TX 77555, USA
2. Department of Anatomy and Cell Biology, Faculty of Sciences, McGill University, 845 Sherbrooke Street West, Montreal, QC H3A0G4, Canada
3. Department of Thoracic Radiology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1478, Houston, TX 77030, USA