Ethical, legal, and counseling challenges surrounding the return of genetic results in oncology - Lolkema, Martijn P; Gadellaa-van Hooijdonk, Christa G; Bredenoord, Annelien L; Kapitein, Peter; Roach, Nancy; Cuppen, Edwin; Knoers, Nine V; Voest, Emile E (Journal of Clinical Oncology, 2013)