[1] Univ Sydney, Dept Psychol Med, Med Psychol Res Unit, Sydney, NSW 2006, Australia
[2] Royal N Shore Hosp, Dept Psychol Med, St Leonards, NSW 2065, Australia
[3] Univ Sydney, Dept Publ Hlth & Community Med, Sydney, NSW 2006, Australia
[4] Royal Childrens Hosp, Victorian Clin Genet Serv, Parkville, Vic 2337, Australia
[5] Royal Melbourne Hosp, Parkville, Vic 3050, Australia
[6] Peter MacCallum Canc Inst, Melbourne, Vic 3000, Australia
[7] Westmead Hosp, Familial Canc Serv, Westmead, NSW 2145, Australia
[8] Prince Wales Hosp, Hereditary Canc Clin, Randwick, NSW 2031, Australia
[9] Womens & Childrens Hosp, S Australian Clin Genet Serv, Adelaide, SA 5000, Australia