"Medicine has a very strong sense of tradition. It is a hierarchical structure and is deeply committed to the preservation of standards. I found it to be very much like the military. The "father" of the American medical training system, William Stewart Halsted was known to work exhaustively and expect the same of his trainees - men like Cushing and Dandy."
A pretty good discussion.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.