[1] Imperial Coll London, Sch Publ Hlth, Publ Hlth Policy Evaluat Unit, London, England
[2] Univ Oxford, Nuffield Dept Primary Care Hlth Sci, Primary Care Epidemiol, Oxford, England
[3] Amer Canc Soc, Atlanta, GA USA
[4] Univ Waterloo, Dept Psychol, Waterloo, ON, Canada
[5] Univ Waterloo, Sch Publ Hlth Sci, Waterloo, ON, Canada
[6] Ontario Inst Canc Res, Toronto, ON, Canada
[7] Country Off World Hlth Org, Dhaka, Bangladesh
[8] Imperial Coll London, Sch Publ Hlth, Publ Hlth Policy Evaluat Unit, Room 319,Reynolds Bldg,St Dunstans Rd, London W6 8RP, England