[1] Univ Wales Hosp, Dept Med Genet, Inst Med Genet, Cardiff CF14 4XN, S Glam, Wales
[2] Ctr Family Res, Cambridge CB2 3RF, England
[3] St Marys Hosp, Reg Genet Serv, Manchester M13 0JH, Lancs, England
[4] St Marys Hosp, Acad Unit Med Genet, Manchester M13 0JH, Lancs, England
[5] Murdoch Childrens Res Inst, Genet Hlth Serv Victoria, Parkville, Vic, Australia
[6] Peter MacCallum Canc Inst, Family Canc Ctr, Melbourne, Vic 8006, Australia
[7] Univ Aberdeen, Sch Med, Dept Med Genet, Aberdeen AB25 2ZD, Scotland
[8] Cardiff Univ, Cardiff Sch Social Sci, CESAGen, Cardiff, S Glam, Wales
[9] Univ Aberdeen, Sch Med, Dept Publ Hlth, Aberdeen AB25 2ZD, Scotland
[10] Princess Anne Hosp, Wessex Clin Genet Serv, Southampton SO16 5YA, Hants, England
[11] Belfast City Hosp Trust, Dept Med Genet, Belfast BT9 7AB, Antrim, North Ireland
[12] Sheffield Childrens NHS Trust, N Trent Clin Genet Serv, Sheffield S10 2TH, S Yorkshire, England
[13] Churchill Hosp, Dept Clin Genet, Oxford OX3 7LJ, England