Sharing decisions in breast cancer care: Development of the Decision Analysis System for Oncology (DAS-O) to identify shared decision making during treatment consultations. - Brown, Richard F.; Butow, Phyllis N.; Juraskova, Ilona; Ribi, Karin; Gerber, Daniela; Bernhard, Jurg; Tattersall, Martin H.N. (Health Expectations, 2011)