1. Advances in Rheumatology
Louis Kuritzky, MD, Arthur Weaver, MD, MS 
Journal of Pain and Symptom Management 
Volume 25, Issue 2, Pages 6-20 (February 2003)
DOI: /S (02)

2. Fig. 1
An adaptation of the traditional 10-cm visual analogue scale. Patients are asked to think about the levels of pain that they experience throughout the day and mark when pain occurs (on the vertical scale) and how intense their pain is (on the horizontal scale), marking down when it is least (L), average (A), and worst (W). See main text for explanation and examples of different pain levels.
Journal of Pain and Symptom Management  , 6-20DOI: ( /S (02) )

3. Fig. 2
Long-term effects of glucosamine sulfate on osteoarthritis of the knee. Placebo n = 106, glucosamine sulfate n = 106. Patients assessed for three years. Glucosamine sulfate led to significant reductions in pain as measured by the WOMAC pain sub-scale (p < 0.05) and significantly less joint-space narrowing vs. placebo (p < 0.05).29
Journal of Pain and Symptom Management  , 6-20DOI: ( /S (02) )