1. Department of Symptom Research The University of Texas MD Anderson Cancer Center Houston Texas USA
2. Department of Cardiac Surgery Spedali Civili di Brescia Brescia Italy
3. Department of Neurosurgery Johns Hopkins University Baltimore Maryland USA
4. Department of Cardiothoracic Surgery New York‐Presbyterian Weill Cornell Medical Center New York City New York USA
5. Division of Education & Training, Research Medical Library The University of Texas MD Anderson Cancer Center Houston Texas USA
6. Department of Head and Neck Surgery The University of Texas MD Anderson Cancer Center Houston Texas USA
7. Department of Surgical Oncology, National Cancer Institute Cairo University Giza Egypt