The Kim paper is generally positive (though targeting not medical
students, but pathology residents):
These results are compelling and support the thesis that Wikipedia
articles can be used as the foundation for a basic curriculum in
pathology informatics.
Has there ever been a general purpose encyclopedia which was found
suitable for medical student instruction?
What are our median level readers going to do if we suddenly start
including enough pathophysiology images to please the med school
instructors? I'm not entirely sure it will help them,