Actually, the scale is so commonly known and used in the medical community that it's now part of the public domain and doesn't need to be attributed at all. Certainly Paul Jones didn't write it.

Here's a link to a very quick history of the EDSS:

http://www.betaferon.com/start.jsp?/...ngms/scale.jsp

Please note that I did *not* design the site, write the materials, or have any part in the photography, layout, or choice of models.