Glucosamine sulfate in the treatment of knee osteoarthritis symptoms: A randomized, double-blind, placebo-controlled study using acetaminophen as a side comparator

1. Herrero-Beaumont, G.
2. Román Ivorra, J.A.
3. Trabado, M.D.C.
4. Blanco, F.J.
5. Benito, P.
6. Martìn-Mola, E.
7. Paulino, J.
8. Marenco, J.L.
9. Porto, A.
10. Laffon, A.
11. Araújo, D.
12. Figueroa, M.
13. Branco, J.