Various discussions led me to this, which seems pretty well written.

Various discussions led me to this, which seems pretty well written. Lots to parse, but important points about pain and care.
http://www.theatlantic.com/health/archive/2014/08/do-people-in-pain-have-a-right-to-relief/375948/
http://www.theatlantic.com/health/archive/2014/08/do-people-in-pain-have-a-right-to-relief/375948