What institution does Rachels quote to establish his claim that active euthanasia has been generally seen as immoral, while passive euthanasia is seen as acceptable?

The institution Rachels quotes to establish his claim that active euthanasia has been generally seen as immoral, while passive euthanasia is seen as acceptable is The American Medical Association.

Explanation:

In his "Active and Passive Euthanasia", James Rachels discusses the morality behind each of the concepts. In active euthanasia, someone would have to administer some sort of lethal drug for the patient to die, while in passive euthanasia, death happens by omission, by doing nothing and simply allowing someone to die. The American Medical Association considers active euthanasia "incompatible with the physician's role as healer". It is the association's beliefe that, even if the patient does wish to die due to prolonged suffering and pain, euthanasia does "more harm than good".