[1] Vanderbilt Univ, Med Ctr, Dept Otolaryngol Head & Neck Surg, Nashville, TN 37232 USA
[2] Kings Coll London, Inst Canc Policy, Ctr Canc Soc & Publ Hlth, London, England
[3] Kings Coll London, Ctr Canc Soc & Publ Hlth, Global Oncol Grp, London, England
[4] Guys & St Thomas NHS Fdn Trust, London, England
[5] Univ Malaya, Med Ctr, Dept Clin Epidemiol, Kuala Lumpur, Malaysia
[6] Queens Univ, Dept Med Oncol, Kingston, ON, Canada
[7] City Canc Challenge, Geneva, Switzerland
[8] Amer Soc Clin Oncol, Alexandria, VA USA
[9] WHO, Geneva, Switzerland
[10] Med Univ Gdansk, Dept Oncol & Radiotherapy, Gdansk, Poland
[11] Groote Schuur Hosp, Div Radiat Oncol, Cape Town, South Africa
[12] Univ Cape Town, Cape Town, South Africa
[13] Univ Barcelona, Dept Med & Hlth Sci, Barcelona, Spain
[14] Aga Khan Univ, Dept Surg, Nairobi, Kenya
[15] Homi Bhabha Natl Inst, Dept Med Oncol, Tata Mem Ctr, Mumbai, India
[16] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Thorac Surg, Mumbai, India
[17] Pontif Catholic Univ Parana, Dept Gynecol Oncol, Curitiba, Brazil
[18] Natl Canc Inst Mexico, Mexico City, Mexico
[19] Korle Bu Teaching Hosp, Natl Ctr Radiotherapy, Accra, Ghana
[20] Shaukat Khanum Mem Canc Hosp & Res Ctr, Dept Gastroenterol, Peshawar, Pakistan
[21] London Sch Hyg & Trop Med, Dept Hlth Serv Res & Policy, London, England