1. Hôpital Tenon; Service ORL-CCF; 4 rue de la Chine Paris France 75020
2. Institut Gustave-Roussy; Biostatistique et Epidémiologie; 94805 Villejuif Cedex France
3. Institut Gustave Roussy; Département de Radiothérapie; 39 rue Camille Desmoulins Villejuif Cedex France 94805
4. Prince of Wales Hospital; Clinical Oncology; Shatin NT Hong Kong
5. Istanbul University; Institute of Oncology; Istanbul Turkey
6. Queen Mary Hospital; Clinical Oncology; Hong Kong Island Hong Kong
7. Wayne State University; Department of Internal Medicine; Detroit Michigan USA
8. Taiwan Co-operative Oncology Group; Taipei Taiwan
9. Sapporo Medical University; Radiology; Sapporo Japan 060-8556
10. Faculty of Medicine Siriraj Hospital Mahidol University; Div of Radiation Oncology Department of Radiology; 2 Prannok Road Bangkoknoi Bangkok Thailand 10700
11. Gustave Roussy Cancer Campus; Plateforme LNCC de Méta-analyse en Oncologie et Service de Biostatistique et d’Epidémiologie; Villejuif France