[1] Univ Cambridge, Dept Publ Hlth & Primary Care, Canc Res UK, Genet Epidemiol Unit, Cambridge, England
[2] Univ Cambridge, Dept Publ Hlth & Primary Care, Canc Res UK, Canc Genet Grp,Dept Oncol, Cambridge, England
[3] St Marys Hosp, Acad Unti Med Genet, Manchester M13 0JH, Lancs, England
[4] St Marys Hosp, Reg Genet Serv, Manchester M13 0JH, Lancs, England