Physician and participant's acceptance of the decision aid is addressed using two questionnaires followed by a Likert response of 1, strongly agree, to 5, strongly disagree (i.e., family assessment item, "The decision support was useful to me in reaching a decision", "I would recommend that others facing the decision use the support", "The decision support interfered with my relationship with patient", Physician assessment item, "I feel the family has made an informed choice", "The decision support was useful in helping this family understand the risk and benefits of the disclosure on terminal illness", "The decision support did not interfere with my anticipated physician-patient relationship with my patient")[Brundage et al2001]. Decision regret is measured by the Decision Regret Scale which is useful tool for measuring regret after decisions at a particular point in time developed by O'Connor et al. It consists of 5 items followed by a Likert response of 1, strongly agree, to 5, strongly disagree. The definition of decision regret is remorse or distress over a decision[O'Connor]. These items were whether regret was felt to be present, whether the decision was the right one for him/her, whether he/she would make same decision again in the same circumstances, whether the decision was a wise one, and whether the decision had resulted in harm. The Decision Regret Scale is translated into Korean by two bilingual individuals, using a forward-backward translation procedure, and completed pilot test.