1. Division of Oncology, Department of Medicine, Stanford Cancer Institute, Stanford University School of Medicine , Stanford, CA , USA
2. Division of Hematology and Oncology, Dartmouth Cancer Center, Dartmouth-Hitchcock Medical Center , Lebanon, NH , USA
3. Division of Hematology and Oncology, Massachusetts General Hospital, Harvard Medical School , Boston, MA , USA
4. Department of Medicine, Olive View-UCLA , Sylmar, CA , USA
5. Department of Internal Medicine , University of Wisconsin School of Medicine and Public Health, Madison, WI , USA
6. Department of Internal Medicine , Rutgers New Jersey Medical School, Newark, NJ , USA
7. Department of Internal Medicine , Universidad Central del Caribe, Bayamon , Puerto Rico
8. Department of Medicine , Yale School of Medicine, New Haven, CT , USA
9. Department of Internal Medicine , Universidad Autónoma de Guadalajara, Zapopan , Mexico
10. Department of Clinical Sciences, Clinical Research Centre, Lund University , Malmö , Sweden
11. Department of Thoracic Oncology , Dana Farber Cancer Institute, Harvard School of Medicine, Boston, MA , USA