Among the five countries status of euthanasia laws in the U.S.A. and at least five other countries, Netherlands (Groningen protocol), Germany, Belgium, Great Britain, and Australia, what are the pros and cons?

Among the five countries status of euthanasia laws in the U.S.A. and at least five other countries, Netherlands (Groningen protocol), Germany, Belgium, Great Britain, and Australia, what are the pros and cons?