Cancer patients and advance directives: a survey of patients in a hematology and oncology outpatient clinic - Hubert, Elisabeth; Schulte, Nadine; Belle, Sebastian; Gerhardt, Axel; Merx, Kirsten; Hofmann, Wolf-Karsten; Hofheinz, Ralf-Dieter; Kripp, Melanie (Onkologie, 2013)