1. Department of Internal Medicine, The University of Alabama at Birmingham, Birmingham, Alabama, USA
2. Department of Internal Medicine, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
3. Department of Medicine, Armed Forces Medical College, Pune, Maharashtra, India
4. Department of Pulmonary Diseases, GROW-School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
5. Division of Medical Oncology, MayoClinic, Rochester, Minnesota, USA