Harvard Medical School - Reflex Sympathetic Dystrophy Syndrome (RSDS)
http://www.intelihealth.com/IH/ihtIH/WSIHW000/9339/24536.html
International Foundation for CRPS & RSD
http://rsdfoundation.usf.edu/crps.html
Reflex Sympathetic Dystrophy Syndrome Association:
http://www.rsds.org
RSD UK:
http://www.rsd-crps.co.uk