“…One classification, based on the level of involvement, distinguishes between active euthanasia (termination of a person's life by a deliberate act, such as injection of medication) and passive euthanasia (termination by inaction). 1,4,6,26 Another classification, based on the expression of a person's will, distinguishes between voluntary euthanasia (termination following a patient's explicitly expressed desire for the act), 1,4,22,28 involuntary euthanasia (without the patient's request), and nonvoluntary euthanasia (in cases where the patient is incapable of consenting). 1,4,15 In this study, euthanasia is defined as a deliberate act intended to terminate the life of a person following his/her explicit request.…”