1. Department of Radiology, University of Texas Southwestern, 5323 Harry Hines Blvd, Dallas, TX 75390, USA
2. Department of Radiology, University of Iowa, 200 Hawkins Dr, Iowa City, IA 52242, USA
3. Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
4. Department of Radiology, University of Sao Paulo, R. Dr. Ovidio Pires de Campos, 75-Cerqueira Cesar, Sao Paulo 05403-010, SP, Brazil
5. Department of Radiology, The Mount Sinai Hospital, 1468 Madison Ave, New York, NY 10029, USA
6. Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
7. Department of Gastrointestinal Oncology, Moffit Cancer Center, 12902 USF Magnolia Drive, Tampa, FL 33612, USA
8. Morsani College of Medicine, University of South Florida, 4202 E. Fowler Avenue, Tampa, FL 33620, USA