RT Journal Article SR Electronic T1 Review: both glucosamine and chondroitin are effective for osteoarthritis, but the magnitude of effect is unclear JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 124 OP 124 DO 10.1136/ebn.3.4.124 VO 3 IS 4 YR 2000 UL http://ebn.bmj.com/content/3/4/124.abstract AB