[1] Univ Newcastle, Sch Med & Publ Hlth, Newcastle, NSW 2300, Australia
[2] Australia & New Zealand Breast Canc Trials Grp, Newcastle, NSW, Australia
[3] Univ Sydney, Sydney Med Sch, Sydney, NSW 2006, Australia
[4] Univ Sydney, Sch Psychol, Sydney, NSW 2006, Australia
[5] Univ Melbourne, Royal Melbourne & Royal Womens Hosp, Breast Serv, Melbourne, Vic, Australia