Combined glucosamine and chondroitin sulfate, once or three times daily, provides clinically relevant analgesia in knee osteoarthritis - Provenza, José Roberto; Shinjo, Samuel Katsuyuki; Silva, Joyce Macedo; Peron, Carla Rosana Goulart Silva; Rocha, Francisco Airton Castro; Bonfá, Eloisa; Silva, Clovis A. (Clinical rheumatology, 2015)