1. Division of Public Health, Department of Family and Preventive Medicine; University of Utah School of Medicine; Salt Lake City; UT
2. Unit of Cancer Epidemiology; CeRMS and University of Turin; Turin; Italy
3. Methods in Community Medicine; University Medicine of the Ernst-Moritz-Arndt University Greifswald; Greifswald; Germany
4. Bremen Institute for Prevention Research and Social Medicine; University Bremen; Bremen; Germany
5. Department of Hygiene, Epidemiology and Medical Statistics; University of Athens Medical School; Athens; Greece
6. Department of Epidemiology, Harvard School of Public Health; Boston; MA
7. Institut Català d'Oncologia, RTICC/CIBERESP, IDIBELL Hospitalet de Llobregat; Barcelona; Spain
8. First Faculty of Medicine; Charles University in Prague; Prague; Czech Republic
9. Cancer Registry of Norway; Oslo; Norway
10. School of Medicine and Dentistry; University of Aberdeen; Aberdeen; United Kingdom
11. Unit of Epidemiology and Biostatistics; IRCCS; Aviano; Italy
12. Unit of Otolaryngology, Hospital “S. Maria degli Angeli”; Pordenone; Italy
13. Department of Environmental Medicine and Public Health; University of Padova; Padova; Italy
14. Oral & Maxillofacial Surgery, School of Dental Sciences, Newcastle University; Newcastle; United Kingdom
15. Croatian National Cancer Registry, Croatian National Institute of Public Health; Zagreb; Croatia
16. Division of Oral and Maxillofacial Surgery, Oral Medicine and Oral Pathology, School of Dental Science, Trinity College; Dublin; Ireland
17. International Agency for Research on Cancer; Lyon; France