[1] Catalan Inst Oncol, Dept Epidemiol, Barcelona 08907, Spain
[2] Int Agcy Res Canc, F-69372 Lyon, France
[3] Natl Inst Publ Hlth & Environm, NL-3720 BA Bilthoven, Netherlands
[4] Univ Athens, Sch Med, GR-11527 Athens, Greece
[5] German Canc Res Ctr, D-6900 Heidelberg, Germany
[6] German Inst Human Nutr, Potsdam, Germany
[7] Univ Turin, Canc Epidemiol Unit, I-10124 Turin, Italy
[8] Sci Inst Tuscany, CSPO, Mol & Nutr Epidemiol Unit, Florence, Italy
[9] Univ Utrecht, Julius Ctr Gen Practice & Patient Oriented Res, NL-3508 TC Utrecht, Netherlands
[10] Univ Tromso, Inst Community Med, N-9001 Tromso, Norway
[11] Univ Oslo, Inst Basic Med Sci, Oslo, Norway
[12] Hlth Council Murcia, Dept Epidemiol, Murcia, Spain
[13] Andalusian Sch Publ Hlth, Granada, Spain
[14] Lund Univ, Malmo Univ Hosp, Dept Med, S-22100 Lund, Sweden
[15] Umea Univ, Dept Publ Hlth & Clin Med, S-90187 Umea, Sweden
[16] Univ Cambridge, Sch Clin Med, Inst Publ Hlth, Cambridge CB2 1TN, England
[17] Univ Oxford, Canc Res UK, Epidemiol Unit, Oxford OX1 2JD, England
[18] Danish Canc Soc, Inst Canc Epidemiol, Copenhagen, Denmark
[19] Univ Aarhus, Inst Epidemiol & Social Med, DK-8000 Aarhus C, Denmark
[20] Inst Gustave Roussy, INSERM, U521, F-94805 Villejuif, France