I am the editor of http://arthritis-symptom.com/. I have been answering questions about arthritis for over 10 years in our discussion group and over 8 years at allexperts.com. While I am not a doctor, I have been working with the arthritis community for over 15 years and have been publishing articles about arthritis for the last ten years. My work editing the arthritis symptom website keeps me in touch with hundreds of different arthritis websites. If I can not answer you question there is a good chance I can direct you to where you can find the information.