[1] NSW Canc Council, Canc Epidemiol Res Unit, Sydney, NSW, Australia
[2] Univ Sydney, Sch Publ Hlth, Sydney, NSW 2006, Australia
[3] Ctr Dis Control & Prevent, Atlanta, GA USA
[4] Univ Minnesota, Sch Publ Hlth, Div Epidemiol & Community Hlth, Minneapolis, MN USA
[5] Vrije Univ Amsterdam Med Ctr, Dept Epidemiol & Biostatist, Amsterdam, Netherlands
[6] Inst Catala Oncol, CERP, Unit Infect & Canc UNIC, Lhospitalet De Llobregat, Barcelona, Spain
[7] Harvard Univ, Sch Publ Hlth, Dept Hlth Policy & Management, Ctr Hlth Decis Sci, Boston, MA 02115 USA