1. Department of Emergency Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
2. Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
3. Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
4. Faculty of Medicine, Saint Joseph University of Beirut, Beirut 1100, Lebanon