`  == Four principles approach ==  The article is lacking substantial discussion on how autonomy, beneficence, non-maleficence and justice (the last of which is missing from the Values in medical ethics section of the article) are grouped into the ``four principles`` approach to medical ethics advocated by Beauchamp and Childress. It also should discuss the status of the approach as a widely-accepted, though disputed, theory by which many ethics cases are judged, and provide comparison with other approaches.   `