I've worked on some medical publications, and you would need a very good rating system. There are all sorts of low-quality manuscripts that uninformed consumers might cling to if its quality (and the quality of reviewers) is not made very clear. This is true about all publications, but especially medical ones where many patients are beginning to look at the sources themselves. Maybe you could even provide two versions of each article; a "professional version" and a summarized "consumer version" for the regular non PhD folk...