[1] WHO, IARC, 150 Cours Albert Thomas, F-69372 Lyon 08, France
[2] Univ Stirling, Stirling FK9 4LA, Scotland
[3] Canc Res UK, 407 St John St, London EC1 V4AD, England
[4] European Inst Oncol, Via Ripamonti 435, I-20141 Milan, Italy
[5] German Canc Res Ctr, Neuenheimer Feld 280, D-69120 Heidelberg, Germany
[6] Univ Leicester, Leicester Canc Res Ctr, UK Therapeut Canc Prevent Network, Leicester LE2 7LX, Leics, England
[7] Karolinska Univ Hosp, Karolinska Univ Lab, S-14186 Stockholm, Sweden
[8] Wageningen Univ, POB 17, NL-6700 AA Wageningen, Netherlands
[9] Maria Sklodowska Curie Inst, Oncol Ctr, Ul Wawelska 15B, PL-02034 Warsaw, Poland
[10] Imperial Coll, Sch Publ Hlth, Dept Epidemiol & Biostat, Norfolk Pl, London W2 1PG, England
[11] Danish Canc Soc, Strandboulevarden 49, DK-2100 Copenhagen, Denmark